However, detectives said they don't know who some of the women are or if they are even alive. The photos were posted on the LAPD website Thursday afternoon.
Lonnie David Franklin Jr. was arrested on July 8. He pleaded not guilty to killing 10 women and one man. But detectives found more than 1,000 other photographs in hundreds of hours of home videos inside Franklin's South Los Angeles home.
One of the main reasons investigators are releasing at least 180 of those photos is to find out if the women pictured are more victims. If so, that could lead to more charges against Franklin.
The killings occurred in two different time periods with a big gap between them. The killings happened from 1985 to 1988 and then again from 2002 to 2007.
The women in the photos appear to be a wide range of ages, Kilcoyne said.
In the photos, some of which are sexually explicit, the women appear to be willing participants, he said. Only closely cropped versions of the photos were released.
Gilda Green-Hagood looked through old newspaper clippings and photographs of her sister Thursday. She was murdered in a motel room in 1984.
Green-Hagood believes her sister, Gayle Marie Rousselle, 40, was a victim of the "Grim Sleeper" and she thinks her sister might be one of among the women depicted in the photos.
"I'm hoping that it's the picture that I looked at," Green-Hagood said. "I have a feeling that it is. We have to be absolutely sure before we talk about it."
Anyone with information related to the "Grim Sleeper" case is asked to call the Los Angeles Police Department at (800) 222-8477 or (877) LAPD-24-7.
The Associated Press contributed to this report.