A man who recently pleaded guilty to being sexually involved with a minor nearly half his age four years ago has received a 20-year prison sentence in Jackson Circuit Court.

Police said the investigation showed Sean McCoun, 31, of Seymour, had sexual relations with a 15-year-old girl in 2011 when he was 27.

He pleaded guilty to a Class B felony charge of sexual misconduct with a minor in exchange for the state dismissing three additional charges.

Police said that on Nov. 11, 2012, the girl, who was then 16, spoke with police and reported the sex offense involving McCoun. She said she was in drug recovery and wanted to tell of the cause of her drug abuse. She also said nude photos had surfaced of her, according to the probable cause affidavit.

The girl told police she was between 14 and 15 years old when she met McCoun, and they started talking and texting.

She said she later started to sneak out of her house to meet with McCoun, who introduced her to methamphetamine, marijuana and prescription drugs.

The girl told police McCoun never forced her to have sex, but he would pressure her when she was under the influence of drugs, according to court documents. She also said McCoun would take inappropriate photos of her.

During a police interview Nov. 21, 2013, McCoun admitted having sex with the girl but said she wasn’t under the influence of drugs when it happened. He also said he never took nude photos of her, but instead the teen would send them to him.

Jackson Circuit Judge Richard Poynter ordered McCoun to serve the first 15 years of his sentence in prison. If he does so without the loss of good time or violations of rules, McCoun may be eligible to serve two years on home detention with an electronic monitor, according to court documents.

The remaining three years of the 20-year sentence will be served on supervised probation for the charge of sexual misconduct with a minor, a Class B felony, according to court documents.

McCoun entered a guilty plea to the sexual misconduct charge in Jackson Circuit Court in April.

As part of the plea agreement, three charges were dropped, including dealing in methamphetamine, a Class A felony; sexual miscon-duct with a minor, a Class B felony; and child exploitation, a Class C felony.

McCoun, who will have to register as a sex offender as part of his sentence, received 231 days credit and 231 days credit time.