Testimony is focusing on DNA evidence and the places where it was or wasn't found as Phil Spector's murder trial advances through its seventh week.
A criminalist testified Monday that the music producer's DNA was not detected on the gun that killed Lana Clarkson, but suggested it might have been hidden under the large amount of the actress' blood on the weapon.
Sheriff's criminalist Steve Renteria, called by the prosecution, also acknowledged that numerous items analyzed by the crime lab showed the DNA only of the dead woman.
"Just because Lana Clarkson was the sole donor (of DNA) that doesn't mean that nobody else on Earth came in contact with those things?" prosecutor Alan Jackson asked the witness.
"Correct," replied Renteria. "It all has to do with the amount of cells present."
Photos: Phil Spector Trial
The defense is expected to argue that the absence of Spector's DNA on the gun means he did not pull the trigger and that Clarkson killed herself. The prosecution may argue that Spector wiped off the gun at some point.
Testimony was scheduled to resume Tuesday.
Clarkson, 40, died on Feb. 3, 2003, from a single shot fired from a revolver in her mouth. Her body was found slumped in a chair in the foyer of Spector's mansion. The gun was found by police on the floor by one of her feet.
Best known for her role in the movie "Barbarian Queen," she was working at the House of Blues when she met Spector and agreed to go home with him for a drink after closing time. Spector's chauffeur said that at 5 a.m. he heard a loud noise and saw Spector emerge from his home holding a gun and saying, "I think I killed somebody."
Renteria, who set up the Sheriff's Department's DNA program in 1994, also testified about the unexpected absence of blood spray from Clarkson on a wall near her body or on the carpet in front of it, suggesting something or someone in front of her could have blocked it.
Renteria said he sprayed the area around Clarkson's body with Luminol, a chemical designed to detect blood unseen by the naked eye.
"Had there been blood spray, would Luminol have detected it?" asked Jackson.
"Yes, definitely," Renteria said.
Spector's and Clarkson's DNA were both found on a pair of brandy snifters in the house, and tests of Clarkson's wrists yielded DNA primarily from her but included a "minor donor" who was Spector, Renteria said.
Renteria also said that an old-fashioned cloth diaper found in a downstairs bathroom contained three bloodstains matching Clarkson's DNA and that a fourth stain with Clarkson's DNA and a little bit of DNA that could be identified only as from a male.
In a hearing with jurors absent, Superior Court Judge Larry Paul Fidler rejected a defense request for a mistrial. The motion contended that prosecutors kept them in the dark about a man who came forward to accuse defense experts of hiding evidence.
"I don't see anything here that rises to the level of stopping this trial and starting again," Fidler said.
Spector, 67, rose to fame in the 1960s with his revolutionary "Wall of Sound" recording technique.