Salt Lake City, Utah where Francisco Alvarez, 55, is under investigation of murder and possession of a weapon by a restricted person after several witnesses allegedly watched him shoot Jorge Veracruz, 29, in a public park. Alvarez has three decades worth of criminal history, first booked for murder in 1980 after running someone over intentionally with a car. He was first paroled in 1986 and continued on to be paroled and sent back 7 times between 1986 and 2000. He was charged as recently as 2007 with 2 felonies and 5 misdemeanors. Originally aired 5/6/2011.