A Southern California man arrested Monday in the alleged murder of a 34-year-old U.S. Army veteran also faces a kidnapping charge because police found a hostage in the suspect’s home, authorities said Wednesday, according to reports.

Antonio Silva, 27, of Santa Ana, is suspected of killing Adrian Darren Bonar, 34, whose body was found wrapped in a tarp in the trunk of a Lexus found abandoned in Anaheim last month.

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Silva’s hostage had been at the house for at least two days and was released from a hospital Tuesday after treatment for unspecificed reasons, The Orange County Register reported. Also found in the home were two grams of fentanyl and firearms including two handguns and two rifles, KTLA of Los Angeles reported.

Antonio Silva is seen in an undated booking photo. (Anaheim Police Department via AP)

Bonar grew up in North County San Diego and was honorably discharged from the Army after serving during the Iraq War. His body was found in an abandoned car on a dirt road near a freeway in Anaheim Hills on Oct. 17. The vehicle may have been there as long as four days, KTLA reported.

Police didn’t give any more information about the manner of Bonar's death nor about the circumstances under which Silva’s hostage was taken captive.

Adrian Darren Bonar, who served in the U.S. Army, was found dead Oct. 17 inside an abandoned vehicle, authorities say. (Anaheim Police Department)

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“Regardless of what Adrian may have been involved in, he’s the victim of this crime,” Anaheim Police Chief Jorge Cisneros said, according to The Register. “No one deserves to die in this fashion.”

The investigation is ongoing.