YT:
PHOENIX - The story of a Phoenix police officer who shot and killed a man Tuesday has taken a shocking twist. We've learned that the officer, Richard Chrisman, is now under arrest.

This all started at a trailer park near Central and South Mountain. A woman called 911 to report domestic violence on the part of her son, 29-year-old Danny Frank Rodriguez.

Officers showed up at the home and at some point, Officer Chrisman opened fire at the man, killing him.

"They killed him for no reason they just shot him," said Elvira Fernandez, the man's mother, anguished. "I said don't hurt him whatever you do don't hurt him... they went in there and they killed him!"

Chrisman was charged with aggravated assault with a deadly weapon, a felony.

The probable cause statement alleges that two officers went inside the mobile home and Rodriguez began yelling that they needed a warrant.

Chrisman allegedly pulled his pistol, put the muzzle against the suspect's head and told him, "We don't need no warrant [expletive]."

Over the next few minutes, Chrisman shocked Rodriguez with a stun gun and shot his pit bull.

When Rodriguez started to retreat by taking up his bicycle, but he and Chrisman struggled, and finally Chrisman shot him from 2 to 3 feet away, according to documents..

Officer Sergio Virgillo, who accompanied Chrisman on the domestic violence call, told detectives that he saw no threat and no weapon in the suspect's hands.

Officer Virgillo, a 14-year veteran of the force, called it "the worst day of his life."

"We will investigate this thoroughly and we will do everything possible to make sure we have the facts and take the appropriate action based on the facts," said Phoenix Police Chief Jack Harris.

Chrisman was released on a $150,000 bond about 3:45 p.m. Wednesday.