SAN ANTONIO -- New evidence comes to light in the murder trial of a man accused of killing and dismembering his girlfriend’s ex.

Michael Quinn and his girlfriend at the time, Connie Yanez, are accused of killing Albert Guerra with a hammer back in 2013.

According to investigators, they went to his house to pick up some of Yanez’s possessions, which Guerra was unwilling to give up.

On Thursday, state prosecutors brought forward forensic evidence they say builds a strong argument against Quinn.

Dr. Kimberly Molina, the Deputy Chief Medical Examiner of Bexar County, testified that they had found 19 injuries on the victims’ head, consistent with the supposed murder weapon. She also revealed her findings support the investigators’ claims that the victim’s body was dismembered with serrated blades and burned after death.

Quinn has previously admitted to the crime during an interview with police shortly after his arrest. He claimed that Yanez had nothing to do with it, and that he had gone at Guerra with a hammer because he punched her in the face.

Molina said she believes autopsy evidence confirms Quinn’s own claims.

Prosecutors also presented DNA evidence gathered from hair found on one of the victim’s hands, saying it almost certainly belonged to Quinn.

Yanez is scheduled to face murder and arson charges in court on Dec. 7, but prosecutors said they have a plea deal in the works that would change those to a lesser burglary charge.

Quinn’s trial is expected to continue on Friday.