Some of the victims were raped before being fatally shot. The "Grim Sleeper" then dumped their bodies in alleys and trash bins.
The reward will be in effect for six months.
CNS contributed to this report.
$500,000 'Grim Sleeper' reward reinstated
LOS ANGELES He is believed to be responsible for the murders of 11 people, 10 of them women. The killings began in 1985 and happened mostly in South Los Angeles. Investigators say the most recent murder took place in 2007.
