LAS VEGAS (AP) — A former Las Vegas firefighter and U.S. Military Academy graduate was found guilty Thursday of hiring a homeless ex-convict to hide in an apartment and kill his estranged wife with a claw hammer nearly three years ago. The 43-year-old former high school valedictorian, U.S. Military Academy graduate and 10-year firefighter was found guilty of seven murder, conspiracy, burglary and robbery charges with weapon enhancements in the slaying of Shauna Tiaffay. The 46-year-old mother of an 8-year-old daughter was attacked and killed as she returned home about 3:30 a.m.