(REDLANDS, Calif.) — Police have arrested a man in connection with a couple who went missing from a nudist community in California. Police are now confident the couple is dead.

The couple’s neighbor, 62-year-old Michael Sparks, was arrested for murder late Thursday, days after the couple were reported missing, according to the Redlands Police Department. Police had been trying to locate Sparks on Thursday, breaching a home and conducting a search using remote video equipment to find him.

Sparks was found underneath his home and he surrendered after lengthy negotiations, according to Redland Police. He has been booked at West Valley Detention Center.

Stephanie Menard, 73, and Daniel Menard, 79, were reported missing on Sunday, according to police. During a press briefing on Thursday, the Redlands Police Department said foul play was suspected after being tipped off by a source in the couple’s neighborhood.

Police are in the process of searching for the couple’s bodies, which they believe are on the suspect’s property. Search teams, including cadaver dogs, are on the property.

The couple’s dog, a white shih tzu named Cuddles, has also not been found.

A source told police on Thursday that a person involved in their disappearance was on the property as they were conducting interviews, leading police to lock down the property and eventually arrest Sparks.

Significant damage was dealt to the suspect’s home when police breached it, but they plan on searching the home as soon as it is safe to enter.

The couple was last seen at their residence on Olive Dell Ranch — a family nudist resort — at around 10 a.m. local time on Saturday. Their unlocked vehicle was found down the road from the residence that day, according to police.

Stephanie Menard’s purse was found inside their residence along with both of their cellphones, according to police.

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