ROCKVILLE, Md. -- Montgomery County police, armed with a search warrant, searched the home of a missing 83-year-old man and found his body in the laundry room.

And police believe the suspect, who is now in custody, may have been living in the house, in the 1700 block of Grandin Avenue, in Rockville, Md., for weeks with the victim's body still inside.

Police said William King was last seen March 19 by his neighbors. One of those neighbors told investigators her mother had filed a missing person's report.

"My mom had been trying to call him for two weeks straight," Danielle Minor Vargas said. "His answering machine wasn't on, he wasn't picking up his cell phone and that was extremely unusual for Mr. King."

Detectives said King's boarder, 41-year-old Kirk Wilkerson, allegedly killed the elderly man and then continued to live in the house with the hidden body. Police said Wilkerson told detectives a fairly believable story about King's whereabouts.

Montgomery County police spokesman Lt. Eric Burnett said, "He gave police a story about where the victim actually was and the story was reasonable at the time."

But detectives had enough questions about Wilkerson's story to return with a search warrant, and that's when they found King's Body.

"The body was found in the laundry room. There was a huge pile of clothes inside the laundry room and the body was found in the area of the clothes," Burnett said.

Police have not said how King died, but they said they believe money is the motive for his death.

Wilkerson is being held in jail without bond.