Watch CBS News
CBS News reviewed police records, body camera footage, court documents and local news reports to find more than 50 cases of innocent bystanders shot by police.
Authorities believe two ransom notes addressed to Nancy Guthrie's family — including a note that said she had died — were likely sent by the person or group of people who abducted her.
David Pearce was convicted of first-degree murder for the deaths of Christy Giles and Hilda Marcela Cabrales after a night of partying in Los Angeles. He was also found guilty of raping seven other women who came forward to testify at his trial.
The last words spoken by Angela Prichard, 55, an Iowa wife and mother who called 911 to report she was in danger, was the first clue investigators had to identify her killer.
A security guard who was among the victims killed in a shooting at the Islamic Center of San Diego is being hailed for his heroism and bravery during the attack.
Approximately 40 million people across the West depend on the Colorado River for water every single day. But the region could soon face drastic measures as the river keeps shrinking.
In Los Angeles, rebuilding after last year's devastating wildfires has been a race to the status quo, with speed winning out over safety and strength.
Local officials in Arizona are pushing to remove Pima County Sheriff Chris Nanos, who is leading the Nancy Guthrie probe, alleging Nanos lied under oath during a deposition for an unrelated lawsuit.
A doctor on trial on allegations he attempted to murder his wife on a hiking trail in Hawaii last year took the stand in his own defense.
Law enforcement sources told CBS News that additional images were obtained from surveillance cameras installed at Guthrie's Tucson home, but they showed nothing suspicious.
According to sources close to the investigation, there are concerns that DNA recovered from Nancy Guthrie's home may not yield a usable profile for comparison.
An image the FBI released of the suspect at Nancy Guthrie's front door, without a backpack, was captured by her Nest doorbell camera prior to the night of her abduction.
Authorities haven't named a suspect or person of interest in Nancy Guthrie's disappearance as the search continued for a third week.
Investigators searching for Nancy Guthrie, the mother of "Today" show co-host Savannah Guthrie, have uncovered several notable pieces of evidence as they try to identify a suspect.
Pima County Sheriff Chris Nanos told CBS News the suspect's backpack is one of the most promising leads in the case, as the search continues for Nancy Guthrie.