SAN DIEGO -- 10News received information that may indicate accused killer John Gardner used a social gathering that included his parents to allegedly target women to attack.

Photos obtained by 10News place Gardner's mother, Catherine Osborn, a nurse, and his stepfather, Kevin O'Reilly, a photographer, at an event at the Rancho Bernardo Community Park on Dec. 27 -- the same day he is accused of attacking a jogger.

The event was hosted by a local chapter of the Hash House Harriers, a popular group that is part drinking club, part running club. The group encourages members to adopt sexually explicit nicknames.

On Dec. 27, about 50 members met at Rancho Bernardo Community Park for a run scheduled for 2 p.m. Photos taken at the event showed Gardner's parents helping with the registration. 10News is still trying to confirm if Gardner had helped with the run's set up or participated in the run.

Hours before, in the park, a 22-year-old woman was jogging on the park trails. In a recent interview with 10News, the woman's mother said her daughter jogged past a man who then bodyslammed her to the ground. She said her daughter threw an elbow at her attacker and was able to get away. The jogger identified Gardner as her attacker.

Legal experts like defense attorney Jan Ronis expect prosecutors to take a close look at the Dec. 27 incident.

"Just to be able to place him in the general area within a general time is a significant point from the prosecution point of view," said Ronis.

When told of 10News' information, an aunt of the jogger said, "It's sick and wrong if he used his family's event to look for victims … but if having family nearby prevented him from chasing down my niece, that's good."

Officers of the running club declined to comment, but did say they don't recall ever seeing Gardner at any of the runs.