FREDERICK, Md. - New court records provide additional details about the events that led to the arrest of an 87-year-old Frederick man accused of fatally shooting his roommate and then going to a local church, where authorities say he admitted killing him.

Irwin Joseph Dickstein is charged with first-degree and second-degree murder in the death of 63-year-old Michael Roy Bushnell, who was found dead Sunday inside the home the two men shared in the unit block of Franklin Street.

Frederick police announced Dickstein's arrest Monday but initially released few details about what investigators believe led to the killing. Charging documents reported by FOX 5 DC now describe an alleged confession at Frederick Christian Fellowship and an argument involving electrical work at the residence before the shooting.

According to the charging documents, a Frederick County sheriff's deputy was sent to Frederick Christian Fellowship after the church's pastor contacted authorities and reported that a congregant had arrived and confessed to killing someone.

A man who had driven Dickstein to the church also spoke with investigators, according to the court records. He allegedly told authorities that Dickstein admitted killing his roommate, whom he identified as Michael.

Frederick police had previously said the Frederick County Sheriff's Office notified the department Sunday that Dickstein had reportedly told a witness he shot his roommate and provided the location where the incident occurred.

Police then responded to the Franklin Street residence to conduct a welfare check. Officers found the home unsecured, entered and discovered Bushnell dead inside.

Charging documents indicate Bushnell was found on the bathroom floor, according to FOX 5.

Investigators say handgun was recovered

Court records also provide new information about a firearm investigators recovered after the alleged confession.

The man who drove Dickstein to the church told police that Dickstein owned a firearm described as a wheel gun and had placed a gray suitcase in the man's vehicle, according to the charging documents.

Investigators later recovered a handgun from the case inside the vehicle.

Frederick police have not publicly released additional forensic details about the weapon or said whether testing has conclusively linked it to Bushnell's death.

Dickstein was located at a separate location and taken into custody without incident, police said. He was transported to the Frederick County Adult Detention Center.

Argument over electrical repair described in court records

The charging documents also describe a possible dispute before the shooting.

According to FOX 5's review of the records, a neighbor told investigators that Dickstein and Bushnell had argued over an electrical repair.

Neighbors separately told the television station that Bushnell had been working on an electrical outlet and had turned off power to the residence, which they said upset Dickstein.

Police have not publicly identified a motive, and the Frederick Police Department said the investigation remains active.

Because the case is still in its early stages, allegations contained in charging documents have not been proven in court.

Dickstein faces two murder charges

Dickstein, whose date of birth is listed by police as Dec. 18, 1938, faces one count of first-degree murder and one count of second-degree murder.

A public defender has requested that Dickstein undergo a competency evaluation, according to FOX 5. He is being held without bail.

A request for a competency evaluation does not determine guilt or innocence. Under Maryland law, courts may order an evaluation to determine whether a defendant is competent to stand trial.

Bushnell was born Aug. 23, 1963, according to Frederick police. He was 63.

Police said investigators believe the killing was an isolated incident and that there is no ongoing threat to the Frederick community.

Case began as Franklin Street death investigation

The investigation began Sunday when Frederick police announced officers were conducting a death investigation in the unit block of Franklin Street.

Police initially told residents there was no threat to the public and said officers would remain in the area while the investigation continued.

The following day, authorities identified Bushnell as the victim and announced murder charges against Dickstein.

Police said the Sheriff's Office played a role in the initial response after receiving information about Dickstein's reported statements.

The newly reported charging documents provide the first detailed public account of how authorities were allegedly alerted to the killing and what investigators believe happened before Dickstein's arrest.

The Frederick Police Department said it is withholding additional information to protect the integrity of the ongoing investigation.

Anyone with information about the case is asked to contact Frederick Police Detective Stephen Radtke at 301-600-3321.

Dickstein is presumed innocent unless and until proven guilty in court.