A Contra Costa County prosecutor alleges that a man and woman charged with murder in connection with a fatal shooting in Antioch last week killed the victim over a $150 debt.

Felicia Viscaina, 25, and Joshua Perry, 31, both from Antioch, were arraigned on murder charges in Contra Costa County Superior Court in Pittsburg Wednesday. The pair is accused of killing 44-year-old Vaughn Walker outside of his home on West 18th Street in Antioch the night of Nov. 8, according to police.

Viscaina had been released from County Jail only a week earlier after serving a year sentence on car theft charges and was also on parole for residential burglary charges at the time of the slaying, Deputy District Attorney Mary Knox said.

The prosecutor said the two went to confront Walker about $150 he owed them. The suspects allegedly shot Walker, who died from his injuries around 9:30 p.m. at a local hospital.

Knox said the pair then attempted to flee to Yosemite with the help of Forrest Murray, 30, of Antioch, whose car apparently ran out of gas before he could help carry out the plan.

Murray was charged with possession of ammunition and being an accessory after the fact.