Why would an illegal alien murder his own family murdering his wife and strangling his three young daughters?

Simon Rios will spend the rest of his life behind bars. A judge today accepted the terms of Rios' plea agreement for brutally killing his wife and three daughters in December of 2005. Nicole pence was at Monday's sentencing and has more. Ironically, it was Simon Rios' in-laws that saved his life. They asked the prosecutor to spare rios from the death penalty. Karen Richards/ Alllen County Prosecutor: "I would have been satisfied to stand there and watch him die, but that's not going to happen. So, i think this is the best outcome for the family and it's really their wishes that are really the most important." In august, the 35-year-old mexican national pleaded guilty to murdering his wife and strangling his three young daughters in 2005. Rios will serve four, consecutive life without parole terms for those murders. He also received a six- year sentence for moving the body of Alejandra Gutierrez. She was the ten-year-old he killed and d just days before murdering his family. http://www.msnbc.msn.com/id/21103377/