Jesus Zambada told a jury that gunplay and cash payoffs were key components of the Sinaloa cartel's business model

Prosecutors allege he participated in the July shooting of a bystander in Brooklyn and the gunpoint robbery of his gang's rivals in the spring

Dr. Tamara O'Neal, the first of 3 victims, argued with the gunman outside Mercy Hospital before the shooting, police said

These are the types of criminal allegations that need to be seen to be believed

A doctor, a pharmaceutical assistant and a police officer were killed in Monday's shooting, Chicago Mayor Rahm Emanuel said

Manhunt on for gunman considered armed and dangerous; woman was shot in head and died in hospital

There is no suspect in custody and no known motive, police said Monday

Which state has the highest proportion of gun owners? Find out here

"All four of these individuals were executed," said Philadelphia's police commissioner

As police swarmed the area Monday afternoon, nurses and doctors were seen with their hands raised coming out

The feud between Casey Kasem's wife and children intensifies amid questions over his death

Christopher Watts pleaded guilty to three charges of murder in the deaths of his wife, Shanann Watts, and their young daughters

Sues department and her commander after her assault allegation and one of racial discrimination

Google, Facebook and Instagram provide clues to mystery of Joey Comunale's disappearance

"48 Hours" has the latest in the investigation into the alleged plot launched by two Houston doctors and their relationship with a former U.S. Army soldier who pretended to take a hit job

Authorities said Brian Varela never sought help for the 18-year-old and instead sent semi-nude photos of her to friends and texting "LOL, I think she od'd, still breathing"

Suspects accused of breaking into a Green Beret's bedroom while he was sleeping, bounding him with duct tape and putting him into a choke hold

Ron Helus was killed when he responded to a shooting at a crowded bar in California

Gregory Bush, who is white, is accused of fatally shooting two African-Americans at a Kentucky grocery store last month