WARWICK — DNA samples taken from a bloody ski mask at the scene of a deadly triple shooting in June matched the genetic makeup of convicted killer Alfred “Freddie” Bishop, the police disclosed yesterday.

In arrest reports and affidavits, the Warwick police offered new details about what went on the night of the home invasion that left Gabriel Medeiros dead and two family members injured and how detectives ultimately came to accuse Bishop of the crimes.

According to the records, the events of June 28 proceeded as follows:

Just after midnight, Caesar Medeiros, 43, and his wife, Claire, 39, were sleeping in a first-floor bedroom of their single-story home when they were awakened by the sound of their dog barking. Figuring it was nothing, they told the animal to quiet down.

The barking persisted and Caesar got up to investigate.

In the unlit hallway outside his bedroom Caesar Medeiros encountered the intruder. Even in the dark he could tell two things: the man wore a ski mask and he had a gun.

Medeiros spoke first, begging the gunman not to hurt his family. He offered up money and jewelry, which he said was stored in his bedroom. Instead of valuables, Medeiros returned with a golf club and ran at the assailant, striking him hard in the head and the arm, trying to dislodge the gun from his grasp.

The blows were so hard they cracked the head off the club.

Hearing the struggle, Claire Medeiros ran into the hall, switching on the light as she went.

It was then that she saw the suspect’s face. His mask had come off, his face was bleeding, but she could see him: thin build, salt and pepper hair. She didn’t recognize him.

The violent scuffle kept on and the man with the gun fired twice before retreating down the hall toward the kitchen at the back of the house. Caesar Medeiros told his wife to stay put and followed the man.

Huddled in the bedroom, Claire called 9-1-1, telling the dispatcher that shots had been fired inside her home.

Meanwhile, Caesar’s brother Gabriel, 35, who’d been living in the couple’s basement, presumably heard the commotion and confronted the assailant when he walked into the kitchen. Gabriel pounced on the man, tackling him to the floor as the suspect fired a single shot, piercing his chest.

With Gabriel Medeiros slumped on top of him, the gunman struggled to get up. Caesar, now in the kitchen himself, wasted no time. He went at the suspect with the shaft of the broken golf club, hoping to stab him in the stomach. Before he could do so, the man fired a second shot, striking Caesar in the thigh (police had previously reported he had been shot in the arm).

Despite the injury, Caesar kept trying to stab the intruder. But the pain from the leg wound was overwhelming. It was hard to stay conscious. As Caesar passed out in the kitchen in a pool of blood beside his dying brother, the gunman escaped out a sliding door, into the backyard. The arrest report indicates that Claire Medeiros was also shot in the leg that night, but does not indicate when in the course of events that shot was fired.

Within minutes, the scene was crawling with police, who multiplied as the hours wore on. They tracked the trail of blood “leading out of and away from the residence,” and collected any evidence they thought might lead them to the mystery assailant, including a rocking chair and the bloody ski mask that had been dropped in the hall. They whisked the items off to the Department of Health’s Forensic Biology unit for DNA testing.

At Rhode Island Hospital, the surviving victims, Claire and Caesar, met with a police sketch artist and helped draw up the composite sketch. That sketch was circulated and a tip hot line was set up in hopes that someone would come forward.

Within five days, the clues led to Freddie Bishop. It started when an unnamed caller on the tip line identified Bishop as a potential suspect, saying he closely resembled the composite sketch. Bishop, 65, was living in the city, at 61 Hollywood Ave., following his release from prison last summer after 33 years on a murder conviction.

Detectives following up on the lead learned more: Bishop’s ex-wife, Marie R. Bishop, 60, lives with her mother at 85 Fairway Lane, just a few houses away from the Medeiros residence.

The night of the crime, a witness had told detectives that “after seeing gunshot flashes coming from the [Medeiros’] 43 Warwick Lake Avenue address, he observed a male figure in the area of 85 Fairway Lane.”

The state Parole Board gave the go-ahead to arrest Bishop July 3, on a parole violation. A board representative yesterday refused to say how Bishop violated parole.

With Bishop sent back to the Adult Correctional Institutions as a parole violator, the Warwick police continued their investigation.

Detectives who were present at the time of Bishop’s parole arrest noticed something telling about the suspect: two deep lacerations on the left side of Bishop’s forehead and bruises on his right arm “consistent with the location and types of injuries which may have been inflicted by Mr. Medeiros,” according to the arrest affidavit.

On Monday, when the DNA results came back, the police got their strongest evidence: a match between the blood on the ski mask and a sample taken from Bishop.

cneedham@projo.com