AUGUSTA — A Winslow man will spend an initial three years behind bars for sexually abusing a minor while the boy was drunk, an offense captured on video by others at the scene.

Adam P. Dyer, 29, had pleaded guilty March 17 to the crime, which occurred Oct. 9, 2015, in Clinton.

Justice Robert Mullen suspended the remaining two years of the five-year sentence and placed Dyer on probation for two years.

At a hearing Thursday morning at the Capital Judicial Center, Mullen described the video as “graphic” and “disturbing” and offered some of his rationale for setting the sentence.

“The victim here is a young man, a teenager, who has his whole life ahead of him to be affected by the offense committed against him; the fact that alcohol was used in connection with this offense; the fact that the defendant has a prior criminal record, albeit one that doesn’t include sex offense convictions; the fact that he initially contended that he was the victim, that he had been raped,” he said.

Mullen said Dyer initially wrote a statement saying he was the victim.

He also noted that Dyer was 28 at the time, and the victim was “a few weeks shy of his 15th birthday.”

Dyer himself addressed the judge, saying, “I understand what happened was obviously wrong.”

He said he had refused previously when the victim “had asked me to do things to him prior to the incident.”

Dyer asked the judge for mercy.

“I really don’t exactly know or remember what happened that night,” he said. “I woke up that morning and started drinking again.”

The prosecutor, Assistant District Attorney Kristin Murray-James, said the victim was “too fragile” to attend the sentencing hearing. Murray-James read aloud a victim impact statement written by the boy’s mother, who was in the courtroom to watch the sentencing but did not want to speak directly to the judge.

The mother said her son is anxious, doesn’t trust anyone outside the family and refuses to leave the house. She said he was bullied at school as a result of this incident and so is being tutored for several hours each day. The woman said she and her son are both seeing counselors.

“I wish I could have stopped this from happening,” she said. “To feed a minor alcohol and rape him, the thought just disgusts me.”

Conditions of probation prohibit Dyer from contact with the victim, with his family and with children, except Dyer’s minor relatives supervised by their parent, with the approval of a probation officer. Dyer also must register for 25 years as a sex offender under state law.

In exchange for the guilty plea to the charge of sexual abuse of a minor, the state dismissed charges of gross sexual assault and furnishing liquor to a minor.

Dyer’s attorney Brad Grant, had argued for a shorter period of initial incarceration, saying that Dyer accepted responsibility by pleading guilty to the charge and spared the victim the ordeal of a trial.

Grant said the victim did not remember what happened until the video was sent to his mother. Grant also said the victim’s phone conversation with his mother just before this incident indicated the victim was not impaired.

The defendant’s mother, who addressed the judge in court, said her son had a problem with drinking and that she thought he would not have done it if he wasn’t drunk at the time.

She said he normally is a kind and good-hearted person.

“When he drinks too much, he blacks out,” she said.

Betty Adams — 621-5631

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Twitter: @betadams