From the Associated Press:

LOS ANGELES — Los Angeles authorities missed a chance to collect a DNA sample from a suspected serial killer before he allegedly killed his last known victim.
A newspaper reported Wednesday that the DNA profile of Lonnie Franklin Jr. was supposed to be collected under a state law that went into effect in November 2004.
Proposition 69 required the Los Angeles County Probation Department to gather DNA samples from tens of thousands of local offenders who were on probation.
Though Franklin was on probation following a 2003 conviction for receiving stolen property, his DNA was never taken.
The probation department says it took time after the law’s approval to implement the new requirements.
Franklin’s last alleged victim was killed New Year’s Day 2007.