The Secret Service analyzed 173 mass casualty attacks. Here's what they found.
The 72-page report tallied red flags leading to public attacks between 2016 and 2020.
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The 72-page report tallied red flags leading to public attacks between 2016 and 2020.
The 66-year-old gunman who went on a killing spree in Half Moon Bay had legally purchased his firearm, had no prior contact with local law enforcement and was an employee of one of the farms he targeted.
Bouquets of flowers were laid in front of a sign that read, "As a community we grieve." It's the same message echoed by Half Moon Bay residents walking down Main Street on Tuesday, a day after the largest mass shooting in San Mateo County history.
The suspect went to a second dance studio after the shooting, but someone there managed to disarm him, the Los Angeles County sheriff said.
California is reeling from a series of gun violence that has claimed 19 lives since Saturday at a ballroom, two farms, and a gas station.
Authorities in Half Moon Bay confirmed seven people were killed and one was critically wounded in a mass shooting Monday afternoon, and a suspect is in custody after turning himself in.
Authorities in Half Moon Bay confirmed seven people were killed and one was critically wounded in a mass shooting Monday afternoon, and a suspect is in custody after turning himself in.
A mass shooting at a gas station in Oakland Monday evening killed at least one person and injured at least seven others, the second mass shooting in the Bay Area Monday and the third in California in three days.
"At the hospital meeting with victims of a mass shooting when I get pulled away to be briefed about another shooting. This time in Half Moon Bay. Tragedy upon tragedy," Newsom tweeted.
As investigators work to determine what motivated a gunman to open fire in a dance hall, residents in Monterey Park struggle to cope with the mass shooting that left 10 people dead.
Mayor London Breed on Sunday pledged that San Francisco police would increase their presence at Lunar New Year events "to ensure safe celebrations" in the wake of the mass shooting in Monterey Park.
The Sunday morning shooting in Southern California has Californians up and down the state on edge.
The gunman was killed after exchanging gunfire with officers, police said.
The gunman was killed after exchanging gunfire with officers, police said.
In times of trauma, a community comes together. That's what Stockton has shown time and again. On Tuesday, they stood united in song remembering a painful day that many shared together more than three decades ago.
Authorities said the home where the shooting occurred was known to law enforcement for gang activity.
A shooter stood over a 16-year-old mother clutching her 10-month-old baby and pumped bullets into their heads in a brazen attack in a central California farming community that left six dead at a home linked to drugs and guns, a sheriff said Tuesday.
Jessica Wilczewski says supervisor who attacked colleagues in a breakroom "made sure who he wanted dead, was dead."
Sacramento's LGBTQ+ community hosted a candlelight vigil Wednesday night in midtown to stop and remember the five lives lost when a gunman opened fire on a gay nightclub in Colorado Springs on Nov. 19.
Fierro said that his military training and the instinct to protect those around him made him react instantly.
The suspected gunman who opened fire at an LGBTQIA+ nightclub in Colorado, killing five and injuring several others, is the grandson of a California assemblymember.
John Suthers says the shooting that left at least five dead "could have been exponentially more tragic" without that intervention in the gay nightclub in his city.
When voters approved Prop. 57, CDCR said inmates would earn early release credits for rehabilitation, good behavior, and education milestones, and would lose credits for bad behavior. But critics argue that's not the case anymore and there's little transparency - pointing to Sacramento mass shooting suspect, Smiley Martin, as a prime example.
The mass shooting prompted a newly minted position, nightlife economy manager, a role Tina Lee-Vogt filled this past Monday.
e police department that serves the Uvalde, Texas, school district has been suspended, officials said Friday, more than four months after a mass shooting claimed the lives of 19 students and two teachers. The decision was made amid several ongoing investigations into the department and its response to the deadly May 24 rampage at Robb Elementary.
The Pentagon announced Monday that a fourth American service member has been killed in Operation Epic Fury.
The weather phenomenon known as El Nino could form later this year, potentially pushing global temperatures to record heights, researchers say.
Three American fighter jets were "mistakenly shot down by Kuwaiti air defenses," CENTCOM said in a statement Monday, as the war with Iran continued for a third day.
Congressmember Kevin Kiley is expected to announce Monday which district he will pick to run for re-election following the passage of Proposition 50, a measure that redrew California's congressional districts.
Optimism is rippling through Persian and Iranian communities across the world and the Sacramento area.
Optimism is rippling through Persian and Iranian communities across the world and the Sacramento area.
The Pentagon announced Monday that a fourth American service member has been killed in Operation Epic Fury.
Three American fighter jets were "mistakenly shot down by Kuwaiti air defenses," CENTCOM said in a statement Monday, as the war with Iran continued for a third day.
The weather phenomenon known as El Nino could form later this year, potentially pushing global temperatures to record heights, researchers say.
Congressmember Kevin Kiley is expected to announce Monday which district he will pick to run for re-election following the passage of Proposition 50, a measure that redrew California's congressional districts.
Another rate hike for parking meters across Sacramento is being considered to help balance the city's $66 million budget deficit. Here are the changes that could be coming to parking spaces across the city.
Adding to the Sacramento skyline is a $300 million project to replace one of the city's most prominent landmarks: the I Street bridge.
If you drive into Sacramento, chances are you're being caught on camera.
Improving access to food and lifting a community — that's been the mission of Universoul Cafe, a Black-owned Sacramento food recovery organization since 2019.
Mayor Kevin McCarty announced a popular midtown business is expanding to fill the old riverfront Rio City Cafe site, which suddenly closed in 2024 in a dispute with the city.
A California judge has tentatively stopped the state from canceling commercial licenses for more than 20,000 immigrant truck drivers.
There's a push at the California State Capitol to allow community colleges to offer bachelor's degree programs.
This week's avalanche north of California's Lake Tahoe has become the deadliest in the state's recorded history. Here are the warning signs experts say you should recognize to avoid avalanche danger.
The California Highway Patrol said the three men were fixing a tire chain on the side of Highway 50 when they were struck by a driver who had lost control of his vehicle. All three suffered major injuries and were taken to the hospital.
The CEO of the California High-Speed Rail Authority was arrested earlier this month in Folsom on suspicion of domestic battery, officials said Monday.
Luka Doncic had 28 points and nine assists, LeBron James added 24 points and the Los Angeles Lakers finished a back-to-back set with a 128-104 victory over the Sacramento Kings.
Precious Achiuwa had a career-high 29 points and added 12 rebounds, Maxime Raynaud scored 22 points and the Sacramento Kings beat the Dallas Mavericks 130-121 on Thursday night.
Reed Sheppard made a career-high seven 3-pointers and scored 28 points, Alperen Sengun had 26 points, 13 rebounds and 11 assists, and the Houston Rockets beat the Sacramento Kings 128-97 on Wednesday night.
Russell Westbrook scored 25 points, and Precious Achiuwa had 22 points and 12 rebounds as the Sacramento Kings snapped a 16-game losing streak — the longest in franchise history — with a 123-114 victory over the Memphis Grizzlies.
Through a sudden death overtime goal, the U.S. men's hockey team is golden over Canada.
The Pentagon announced Monday that a fourth American service member has been killed in Operation Epic Fury.
Congressmember Kevin Kiley is expected to announce Monday which district he will pick to run for re-election following the passage of Proposition 50, a measure that redrew California's congressional districts.
"Sadly, there will likely be more before it ends. That's the way it is. Likely be more," President Trump said after mentioning the three U.S. service members killed in the operation.
The first U.S. casualties of the war with Iran occurred among American personnel based in Kuwait.
The Supreme Court is set to convene Monday to hear a Second Amendment dispute over a federal law that bars unlawful drug users from having firearms.
Multiple elephant seal pups along the Northern California coast have tested positive for the deadly avian influenza, or bird flu, according to new research from the University of California.
Here's what to know about TrumpRx, including how it works, who can use it, and how much money it can save.
Health officials in the East Bay said a man has died from consuming toxic wild mushrooms, amid an ongoing spike in mushroom-related poisonings throughout California.
Health officials in Napa County confirmed Wednesday that a child has been diagnosed with measles in the county's first case in nearly 15 years.
The Harmony Health Street Medicine team spends their days visiting encampments and connecting with vulnerable people, meeting them where they are and offering care outside of a clinic and without barriers.
Finding the perfect dress isn't easy, but now, selling them could become a lot more challenging.
This weekend, Placer County is hosting its annual Sip Into Spring event, offering free or discounted tastings at more than 20 wineries along what's known as the Placer Wine Trail.
From fruits and veggies to car parts, economists project that businesses will pass along the cost of the tariffs to customers.
An economic blackout was underway Friday as activists nationwide encouraged people not to spend their money at large corporations, retailers and fast-food chains for 24 hours.
San Joaquin County's retail theft reporting app has only been around for six months and is already bringing a sense of calmness to local business owners.
President Trump and Gov. Gavin Newsom have made several different claims about California gas prices. Here's what we found.
This year-long investigation provides an unprecedented look at California's one-party supermajority legislature through the eyes of grieving parents who discover how California lawmakers kill popular bills by not voting.
This year-long investigation by CBS News California investigative correspondent Julie Watts examines the many components of California's new tougher-on-crime law.
A Natomas mother demanded that her daughter be exhumed and cremated after a Sacramento cemetery moved her grave without telling the family.
The California Highway Patrol captain accused of workers' compensation fraud was the commander in charge of the fatal Mahaney Park shootout in Roseville, three officers who worked under him at the time of the shootout said.
CBS13 and the Call Kurtis consumer investigative team devised an idea on how to lower what consumers owe on their credit cards -- and it begins with a simple phone call.
No one wants to think about death. However, it's important to plan on what happens to your digital assets after you die.
After spending $18,000 on waterproof laminate floors, a Natomas couple spotted damage after the first cleaning.
More than a year after Hai Pham canceled the trial membership, he kept getting charged every month for it.
A Natomas mother demanded that her daughter be exhumed and cremated after a Sacramento cemetery moved her grave without telling the family.
A man has been arrested and charged in connection with the Tiger Fire that burned 118 acres in California's Amador County last summer and forced evacuations near Pioneer.
A major home developer is rethinking how communities are built in wildfire-prone areas and the future is taking shape in El Dorado County.
San Joaquin County secured a grant aimed at helping to build a wildfire protection plan for the entire county.
More than two dozen structures were destroyed in a wildfire in the eastern Sierra Nevada mountains on Wednesday afternoon, officials said.
Clean-up has started in Chinese Camp after the TCU September Lightning Complex Fire ripped through the Gold Rush town earlier this month.
A Sacramento County dog picked up thousands of miles from home after he went missing five years ago was reunited with his family on Wednesday.
What started as a suspicious circumstances call for Rancho Cordova police ended with a newborn surprise.
A once-empty lot behind Church of the Cross in north Modesto now hosts a thriving community garden with more than 140 plots and growers from across the globe.
A Sacramento-area middle school history and English teacher is in the running to win big as America's Favorite Teacher, a title her students think she is more than worthy of being awarded.
Junior Romello Bruhn of Woodland Christian High School is closer than ever to scoring 3,000 career points, something only 13 high school athletes have accomplished in California state history.
Some gas stations around Sacramento were already seeing prices push past $5 a gallon early Monday morning.
Congressmember Kevin Kiley is expected to announce Monday which district he will pick to run for re-election following the passage of Proposition 50, a measure that redrew California's congressional districts.
Optimism is rippling through Persian and Iranian communities across the world and the Sacramento area.
Rams win 65-47 over Lions.
Placer wins 63-51 over Beyer.