DUNMORE, Pa. (AP) - Three people have been ordered to stand trial in the death of a northeastern Pennsylvania man who authorities allege was strangled with a pair of jumper cables and dumped over an embankment after an apparent overdose.

A Lackawanna County district judge ruled Friday that there was enough evidence to try Preston Layfield, 19, Tyler Mirabelli, 22, and Amanda Wayda, 20, on first- and third-degree murder, aggravated assault and abuse of a corpse charges. The three were originally charged with assault but murder charges were filed Friday after the coroner ruled the death of 21-year-old Joshua Rose a homicide by asphyxiation.Layfield testified that Rose apparently began to overdose in a Scranton home in August, but Wayda didn't want to call 911 because she had outstanding warrants, so they drove him on Interstate 81 to Susquehanna County but passed a hospital. Authorities allege that a plastic bag was then placed over his head, he was strangled and his body dumped. Before a stop for gasoline, sunglasses and a hat were placed on the dead victim, authorities alleged.Layfield alleged that Wayda pushed the plastic bag down on Rose's head and held her hand over his mouth. After Rose tried to raise his arm and gurgled, she asked for a cellphone charging cord to strangle him, but it wasn't enough, Layfield alleged."Amanda said, 'No, that's too small,'?" Layfield testified, saying he then fished out a set of jumper cables and Wayda looped them around Rose's neck and said "Pull."Layfield said he felt mounting guilt in the four days between the murder and their arrests. He said he confessed almost immediately to his father, who didn't believe him at first. Wayda told friends that Rose had slipped down an embankment and disappeared.Attorneys for the other two defendants tried to point out inconsistencies in his story and at one point accused him of lying. Wayda's attorney, Jim Elliott, sparred with prosecutors after testimony indicated that Layfield had earlier told state troopers a different story."When he says 'I'm not involved and she strangled him,' that's a lie," the attorney shouted.Layfield's attorney, Paul Ackourey, acknowledged his client's credibility will be scrutinized but said Layfield hadn't minimized his role and "did not relish his role" as a witness.