A handyman who worked in Yosemite National Park in the United States has confessed to several grisly murders. He says he killed four women -- a park naturalist and three sightseers.

Cary Stayner confessed to a San Francisco TV station Monday night in an off-camera jailhouse interview.

Stayner said he was responsible for the murder of a Yosemite National Park worker who was killed last week and three park tourists who were killed in February.

Stayner said he was acting out fantasies about killing women that he had dreamed about for over 30 years.

In the chilling interview the 37-year-old man described in meticulous detail how he killed the three tourists, Carole Sund, her daughter Juli and a 16-year-old family friend from Argentina Silvina Pelosso.

He also talked about killing the park worker Joie Ruth Armstrong last week. He said he could not resist the urge to kill her once he realized that she was alone.

"I am guilty," Stayner said, but he denied that any of the women were sexually molested.

Stayner apologized to the families of his victims. He said he was sorry their loved ones were "where they were, when they were. I wish I could have controlled myself."

Stayner has only been charged with one of the murders, but sources say more charges will be laid after he confessed to law enforcement officials that he committed all four murders.