“A San Francisco forensics expert testified Thursday that blood found between the beds of LaDonna Mathis and son Patrick belonged to Patrick.”

“Brian Wraxall said he tested several blood samples on the request of Mathis’ defense lawyers. He conducted more tests than did the FBI, defense lawyer Wally Eklund said.

Under questioning from Eklund, Wraxall said he did not know before the testing what conclusions would be drawn from the test.”