MONTEREY PARK ( – Authorities Wednesday said blood was found in the home of a 58-year-old man who disappeared under mysterious circumstances last week from a home in the Santa Clarita neighborhood of Valencia.

An undated photograph of Will Cierzan and his wife. Will Cierzan disappeared Jan. 26, 2017, from his Valencia, Calif., home. (Credit: Cierzan family)

An undated photograph of Will Cierzan and his wife. (Credit: Cierzan family)

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Will Cierzan, an employee at Magic Mountain, went missing sometime between 4 p.m. and 7 p.m. on Jan. 26. His wife of 28 years, Linda Cierzan, said that when she spoke to him by phone at about 4 p.m. that afternoon, he told her that he was making dinner.

“He was in a really good mood, he was happy, he was telling me that he was making dinner, because he likes to cook now, and that he had a really good day watching golf,” Linda said at a news conference Wednesday in Monterey Park.

When she arrived home from work, she found his truck parked outside. His wallet, keys and jacket were in the home, but he was nowhere to be found. Cierzan’s family said he was last seen by his nephew that day before he vanished.

Los Angeles County Sheriff’s Department officials said blood was later found in the home. Investigators are still trying to determine who the blood belongs to.

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“We are in the process of analyzing that and trying to come up with a scenario of how it got there,” Sheriff’s Det. Ralph Hernandez told reporters.

Video from a neighbor’s security camera shows no sign of Cierzan. However, the footage did show a white-colored SUV backing up to the garage in the early evening. The video shows the SUV leaving minutes later. At the news conference, detectives said the truck belongs to a family member, but did not specify who. It’s unclear if the driver of the SUV was Cierzan’s nephew.

Cierzan’s sister told KCAL9 by phone her son did not indicate that there were any signs of trouble prior to Will’s disappearance.

“He (the nephew) said everything looked fine, everything was fine,” Will Cierzan’s sister, Andrea Peck, said. “I asked that question. You know, did he have a headache? Was he not feeling good? Was he acting like, did you guys get into any kind of argument. We went through all that. And it was kind of like, no, nothing.”

“We’re not going to name the relative,” Hernandez said. “There was a family member at home with Will during the day. He has actually been spoken to and has provided a statement to us.”

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The sheriff’s department is not confirming that a crime was committed. This remains a missing person’s case at this point, officials said.