41.   Whitehurst has challenged the integrity of a colleague, Roger Martz, whose testimony on blood evidence has undermined defense claims of a police conspiracy.

42.   With blood evidence expected to play a major role, experts on the use of DNA matching methods will be crucial.

43.   Police also had blood evidence and a piece of a tooth that tied Baker to the crime.

44.   A key defense theory has been that the blood evidence was sloppily collected and perhaps tampered with, making results unreliable.

45.   Also Monday, prosecutors were to update the judge on how and where further DNA testing of some blood evidence may be conducted.

46.   Dr. Sheppard was right-handed but forensic scientist Paul Leland Kirk, a defense witness at the second trial, said blood spatter evidence indicated the killer was left-handed.

47.   He is expected to say that a substance used to preserve police crime lab blood samples was found in some blood evidence.

48.   In his DNA testimony, California Department of Justice scientist Gary Sims presented more blood evidence.

49.   Lionel Cryer questioned the police blood evidence.

50.   Martz had testified that only negligible amounts of a nonclotting preservative used at the Los Angeles police lab were found on some crime scene blood evidence.