PARIS – Spent shell casings found at the scene of a double slaying in West Paris matched unspent bullets found at the home of Duane Christopher Waterman, according to a police affidavit released Wednesday.

Waterman, 32, of Sumner, pleaded not guilty Wednesday in Oxford County Superior Court to killing Timothy Mayberry, 50, of West Paris, and Todd Smith, 43, of Paris in July.

According to the affidavit, Waterman indicated that Mayberry supplied him and others with “Oxys” – Oxycontin pills. Waterman told police that he took the opiate for a back injury, but no longer had a prescription for it, so he bought the pills from local dealers.

Waterman said he owed Mayberry between $1,500 and $1,800 over a drug deal involving a third party who refused to pay.

He also told police that Mayberry owed money to a motorcycle gang from Rumford or Bryant Pond for Oxycodone pills. Waterman told an acquaintance, “They’re gonna think it was me, because I have a past, but I know who shot them.”

Mayberry’s body was discovered on the evening of July 26 on a rock wall near his residence at 89 Tuelltown Road. Smith’s body was found in a bathroom inside the house. The State Medical Examiner’s Office determined that both men died of multiple gunshot wounds.

According to the sworn statement of Maine State Police Detective Scott Gosselin, two spent .380-caliber shell casings were found inside the house. The casings came from the same manufacturer of .380 unspent bullets found at Waterman’s house at 30 Front St. in Sumner, according to the Maine State Police crime lab.

According to the affidavit, an acquaintance told police Waterman had a .380-caliber handgun on July 23; and police seized handwritten receipts from two prior owners of the gun from a safe at Waterman’s house.

Gosselin also wrote that Waterman, his wife, and their three children had been staying at Mayberry’s residence about a month before the murders. Mayberry evicted the Watermans and accused Christopher Waterman of owing him about $4,000, according to the affidavit.

The affidavit included transcripts of several recorded conversations between Waterman and his wife prior to the murders. Naomi Waterman, charged with theft, was in the Oxford County Jail where calls are subject to monitoring.

In the calls, which took place between July 15 and July 25, Waterman expressed anger over accusations that he and Naomi were “rats” and worried that his children would be shot or their house burned down due to rumors.

On the evening of July 25, when police believe the murders occurred, Waterman said, “I’ve just […] had enough of these people thinking they’re […] gonna push me around and they don’t know who the [expletive] they’re dealing with. They’re gonna learn. They’re gonna learn real […] fast. I ain’t playing games.”

Waterman entered his not guilty pleas Wednesday before a large group of family and friends of the murder victims seated in the courtroom.

Dianna Parmeter, Mayberry’s sister, said Mayberry was honorably discharged from the U.S. Army and loved his family and the outdoors.

“He was a wonderful person,” Parmeter said. “Very hard-working.”

Defense attorney John Jenness Jr. said he may request a change of venue for the trial.

Justice Roland Cole said he believed an impartial jury could be selected from Oxford County, but that Jenness could file the request and other motions within 45 days of Wednesday.

Cole also ordered that jury selection for a trial be set for May 11, 2009, and that a 35-page police affidavit in support of probable cause for Waterman’s arrest be made public.

Waterman continued to be held without bail at the Oxford County Jail.