LOS ANGELES, Ca. (KTLA) -- A man with a home filled with guns and whose decomposed body was found in an SUV in Pacific Palisades was believed to be a human/alien hybrid secretly working with the U.S. government by his fiancée, according to the woman's mother.

Dawn VadBunker was last seen by her family on the same day Jeffery Lash allegedly died. Lash has not been officially identified, but his former attorney confirmed his name to KTLA.

VadBunker's mother believes her daughter has been caught in the middle of a mysterious death investigation and may be suffering from a mental breakdown. According to Laura VadBunker, her daughter believes Lash was an alien "sent to earth to protect us."

"I can't believe this," Laura VadBunker told KTLA in a telephone interview. "It's worse than a Twilight Zone movie and we've lived through hell."

Lash's body was discovered by police on July 17 in an SUV in the 1700 block of Palisades Drive. Police were alerted to the body by an attorney representing the victim's fiancée Catherine Nebron, who also happens to be VadBunker's employer.

Lash collapsed on July 4 in the parking lot of a Bristol Farms in Santa Monica, according to Nebron. She and VadBunker tried to help him, but Lash died, defense attorney Harlan Braun told KTLA.

Nebron and VadBunker believed Lash was a secret government agent, but not entirely human.

"He was part alien and part human and was out to save the world," Laura VadBunker said.

Nebron didn't notify authorities when Lash died because she thought the secret agencies he worked for would come and collect his body, she told Braun.

She left him in her SUV near their home and went to Oregon with VadBunker, whose family reported her missing two days later.

"It was craziness, it was nuts," Braun said.

After two weeks, no one had come to get Lash's body.

"When she came back, she was shocked that the agencies hadn't picked him up," Braun said. "So then she decided she'd better call police."

Inside the home, detectives found more than 1,200 firearms — including handguns, rifles and shotguns — as well as more than 6 tons of ammunition, according Braun.

There were also a number of SUV's modified for use on different types of terrains, including an amphibious vehicle, he said.

Braun also claimed police found $230,000 in cash, which his client knew nothing about.

As for VadBunker, she has still not returned from Oregon or called her parents or her children, her mother said.

She did send a letter in which she confirmed she was there when "Bob" died and that he "fought to stay alive," according to her mother.