VISTA — A physician gave jurors a deeper look into the horrific murder of a young mother five years ago in her Vista home. “I have reason to believe the event went on for some period of time,” Glenn Wagner, a coroner with the San Diego Medical Examiner’s Office, testified. On Oct. 28 in a Vista courtroom, Wagner detailed the 75 injuries Carolyn Rebecca Neville sustained in her residence during the morning of Sept. 1, 2005. Neville’s body was found in the living room near the front door at the end of a trail of blood, according to court documents. Authorities believe Neville, 24, was murdered by Deryln Ray Threats, whom they believe used a pair of gardening shears and two knives. Police arrested Threats a few houses away. A stun gun and wooden hammer handle were found on him at the time as well as a pair of bloody socks, according to witness testimony. Wagner said the injuries reflected the use of shears and/or a knife but not a hammerhead. Still, he said he couldn’t exclude a hammer. “I believe when she went down into the position she was found she was alive but dying,” Wagner said. At that point, he said the attacker progressed Neville’s death with penetrating injuries. Prosecutors allege the murder was in connection to a burglary in progress. If convicted of murder with the special circumstance allegations, Threats, 28, faces the death penalty or a no-parole life prison sentence. He is also charged with residential robbery and residential burglary. Attorneys James Weintre and Wil Rumble, who are representing Threats, maintain that evidence will show that someone else committed the murder and that police were mistaken when they arrested Threats that morning. The case is expected to run through November.