A 55-year-old man arrested during a standoff in Rancho Palos Verdes is suspected of killing a man there weeks ago and then dumping his body in a shallow grave in Perris, officials said Tuesday.

The suspect, whose name still has not been released, was holed up inside the house in the 2000 block of Van Karajan Drive for hours Monday morning while police arrested other people who lived in there. The man, described only as white, had locked himself in a bedroom for two hours before surrendering at noon, said Los Angeles County Sheriff’s Department homicide Lt. John Corina.

He is suspected in the murder of 39-year-old Anthony DePiazza, whose body was discovered dumped under a tree in Perris on Nov. 23, according to the Riverside County Coroner’s Office. DePiazza’s cause of death was not released. A father and son riding bikes saw a body under the tree as they passed an open field at 10:45 p.m. and called police.

• PHOTOS: Homicide suspect standoff at Rancho Palos Verdes home

Corina did not give any further information about the suspect or victim, but a search of Riverside County court records shows Depiazza had a lengthy criminal history in that area. He was most recently convicted of a parole violation in Banning in May, but his online social media account says he lived in San Pedro.

Police continued to search the Van Karajan Drive home for weapons after the arrest. No further information was immediately available.

Anyone with information about the slaying is encouraged to contact the Sheriff’s Department Homicide Bureau at 323-890-5500. Anonymous tips can be given by calling Crime Stoppers at 800- 222-TIPS (8477), or texting the letters TIPLA plus the tip to CRIMES (274637), or by using the website http://lacrimestoppers.org/.