Man arrested in St. Mary Parish slaying Man arrested in St. Mary Parish slaying Acadiana bureau March 11, 2013 Comments FRANKLIN — St. Mary Parish Sheriff’s Office detectives have arrested an 18-year-old Patterson man on one count of second-degree murder in the January shooting death of a Bayou Vista woman. Marcus Jay Hamilton, 1715 Guyther St., Patterson, was arrested at 10 p.m. Thursday, St. Mary Parish Sheriff’s Office spokeswoman Traci Landry said in news release Friday. Hamilton is accused of shooting and killing Keyiona Chenevert on Jan. 21 in an apartment on Three B’s Lane in Bayou Vista, Landry said. Chenevert was shot once in the head, Landry said. St. Mary Parish law enforcement officials are “safe-guarding” much of the information detectives have gathered since the shooting “to protect the integrity of the ongoing case,” Landry said. No bond has been set for Hamilton, Landry said.