NEW ORLEANS (AP) - One prosecutor in New Orleans says it shows how "desperate" and "evil" some people are. Officials say a murder suspect was part of an alleged jailhouse murder plot against an eleven-year-old boy who witnessed his uncle's killing. It's the latest in a series of crimes stemming from the 2003 shooting death of a teenager who was killed as he sat in a car with the boy and the boy's mother. The mother was shot to death two months later -- the same day she testified before a grand jury in the the killing. The mother's boyfriend was also killed. The youngster remains in the district attorney office's protection program. The killing of his mother remains unsolved.