In-Depth: July 21 ambush against RPD officer Mazurkiewicz

ROCHESTER, N.Y. Kelvin Vickers is accused of murdering Rochester Police Officer Tony Mazurkiewicz and shooting Officer Sino Seng and 15-year-old Tamaia Walker during the ambush on July 21.

Vickers has been indicted on eight charges including murder, attempted aggravated murder and attempted murder. Vickers has pleaded not guilty to all of them.

He had just been released from a maximum security prison in Massachusetts on May 24, less than two months before the shooting. He was not on parole or supervised after his release.