"We have a four-and-a-half-year-old child," said neighbor Barry Levinson. "It's an old and established neighborhood. There are older couples that have grandchildren that come all the time. There are newer couples that are moving in that have kids."
According to the Megan's Law registry, Hinnenkamp was convicted of sexual battery and indecent exposure, and in 1990, the Huntington Beach resident was convicted of lewd or lascivious acts with a child.
Neighbors said he had planned to move into the home he inherited from his parents in a couple of months. The home is about 150 feet from Laguna Lake Park.
However, Hinnenkamp's parole date has been extended another year until November 2011. The reason for the extension is unknown.
But neighbors are still concerned that once his parole is up, he'll be able to move into the area, and parole will have no jurisdiction over him.
Jessica's Law bars sex offenders from living within 2,000 feet from a park, but officials said Hinnenkamp's parole agent may not consider Laguna Lake Park an actual park that children regularly gather.
The city and police counter that claim, saying children have been gathering at that park for decades.
"According to the police, this is a bad dude, and we don't want him here," Levinson said.
ABC7 was unable to contact Hinnenkamp for a comment.
Police said if Hinnenkamp moves in, they will file paperwork with the district attorney's office for a request for prosecution for violation of Jessica's Law.