Officers from two Nevada law enforcement agencies opened fire during a pre-dawn chase through Las Vegas as they tried to stop a man who fatally shot his mother, then stole a police cruiser and carjacked bystanders at gunpoint while trying to evade police, authorities said Friday. The rampage two days after Christmas left three people dead: The suspect, his mother and a bystander who was on his way to work when he pulled over for the emergency vehicles pursuing the suspect. Jerry Lopez, a 39-year-old father of seven, unknowingly entered the suspect's path and was killed.