By Martin Kasindorf, USA TODAY LOS ANGELES — A prosecutor complained Tuesday that police had lost or destroyed biological evidence in thousands of unsolved sex-crime cases, preventing scientists from using DNA analysis to pinpoint suspects. Lisa Kahn, a Los Angeles County deputy district attorney, said that hair, blood, semen and skin samples gathered by detectives in as many as 4,000 rapes and sex murders were gone from evidence lockers of the Los Angeles Police Department and the county sheriff's department. "This can't continue," Kahn said. Crime-lab scientists, using grants from California's 1-year-old, $50 million "cold hits" program, wanted to extract...
