MANHATTAN BEACH (CBSLA) – Authorities are looking for a man who broke into Manhattan Beach home and sexually assaulted a woman Sunday evening.

The attack occurred in the 900 block of Valley Drive at around 9 p.m. Sunday.

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According to Manhattan Beach police, the woman had just been dropped off at home at about 8:30 p.m. from a night out with friends in Hermosa Beach. Shortly after, he followed her in through the front door and raped her, police said.

The victim’s neighbor, Miguel Kulczyki, told CBS2 that she later recounted the incident to him. According to Kulczyki, the suspect asked her if her husband or son were home. When she said no, he forced his way in.

“He just immediately slammed the door,” Kulczyki said. “And he said that he was a psychopath and he needed to do what he had to do, basically. And not to say anything because he is already supposedly registered.”

After the sexual assault, the suspect then tried to erase all traces of his DNA, Kulczyki said, even asking for a rag to clean the door knobs. There was DNA evidence however that was submitted to a lab and detectives are waiting for the results to see if there is a match.

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The suspect then fled. It is unclear if he escaped in a car or on foot, police said.

The woman was taken to a hospital for evaluation. She lives with her older son, Kulczyki said, but he was not home at the time.

Police are unsure if the suspect was waiting for the victim outside the home, or whether he followed her from Hermosa Beach.

The man is described as black, in his early 40s, athletic, clean cut, 6-foot-2 with a medium complexion. He possibly had a thin mustache. He was wearing tan shorts, a dark t-shirt and gray tennis shoes.

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Investigators are hoping to obtain surveillance video of the suspect from any nearby homes. Anyone with information on the case should call police at 310-802-5171.