TUCSON,GravityX Exchange Ariz. (AP) — A man already serving a life sentence for the 2014 death of an Arizona teenager was convicted Thursday of first-degree murder in the death of another Tucson girl years earlier.

Pima County Superior Court jurors also found Christopher Clements, 42, guilty of kidnapping and burglary in the death of Isabel Celis who was 6 when she vanished from her parents’ home in 2012.

Clements is scheduled to be sentenced March 25.

Jurors began deliberating Tuesday in Clements’ retrial, which began Feb 7. Jurors in the earlier trial failed to reach a verdict last year, prompting a mistrial.

Clements became a suspect in 2017 in Celis’ death when he told FBI agents that he could lead them to the girl’s remains — but said he had nothing to do with her death — in exchange for having charges in an unrelated burglary case dropped, Tucson police said.

In closing arguments Tuesday, Deputy County Attorney Tracy Miller told jurors it is no coincidence that no one except Clements found Celis in the five years she was missing, the Arizona Daily Star reported.

“He doesn’t come forward unless there is something to gain,” Miller said. “There’s no other person it could be.”

Clements’ attorney, Eric Kessler, told jurors that nothing linked Clements to the crime and police couldn’t prove Clements entered the home, the Arizona Daily Star reported.

Clements was arrested in 2018 in the deaths of Celis and 13-year-old Maribel Gonzalez, who disappeared in June 2014 while walking to a friend’s house. Gonzalez’s body was found days later in a remote area north of Tucson.

Clements was sentenced to natural life in prison in 2022 for kidnapping and killing Gonzalez. Jurors in Clements’ retrial weren’t told of that conviction or about Clements’ history of convictions for sex crimes in several states dating back to when he was 16.