District Attorney Releases Critique of DNA Evidence in 2007 Homicide
A highly regarded prosecutor and DNA expert who was employed for three years at the San Francisco District Attorney's office authored a critique of work at the San Francisco Police Department crime lab earlier this year expressing significant misgivings about the performance of the lab's DNA section supervisor.
The critique, obtained by SF Weekly in response to multiple public-records requests filed with the DA's office, shows that Rockne Harmon — a veteran of the O.J. Simpson case whom Harris has called “the guru of DNA evidence in the state” — believed DNA lab unit supervisor Cherisse Boland had written a “misleading” forensic report on evidence found at the scene of a 2007 murder in Visitacion Valley.
The critique also challenges Boland's decision not to search for a match for the majority of the DNA found at the crime scene. The analyst chose instead to focus on trace amounts of DNA that she said linked two suspects arrested by police to the murder.