Denver authorities: Dead inmate killed up to 20

A man who died in prison in 1996 after being convicted of murdering three women also killed four others between 1979 and 1988 and might be responsible for as many as 20 homicides, authorities said. Vincent Groves, a tall hulking athlete who played on a high school championship basketball team, strangled most of his victims, said Denver District Attorney Mitch Morrissey.