NORTHAMPTON — An Easthampton man was sentenced to 18 months in jail after he admitted he inappropriately touched a 15-year-old girl on two occasions.

Justin L. Day, 24, pleaded guilty in Northampton District Court Monday to five counts of indecent assault and battery on a person 14 or over, one count of assault with a dangerous weapon and intimidation of a witness. As part of the plea deal, the Northwestern district attorney’s office will not seek further prosecution on charges of rape of child with force, statutory rape of a child and unnatural act with a child under 16.

Massachusetts State Police began investigating the incident on May 24, 2017, after receiving a report from the girl’s mother that her daughter was sexually assaulted by Day on two days in the week before she contacted police. The Gazette does not generally identify victims of sexual assault.

Questioned by police, Day admitted to touching the girl’s chest and genitals, according to court documents.

“Mr. Day stated that he immediately knew what he did was wrong …,” Trooper Alan Gamache wrote in a report on the incident.

The girl’s mother told police that Day also admitted to her that he touched the girl’s chest, according to Gamache’s report.

The girl reported to police that in addition to the touching, Day told her to “take it to her grave,” Gamache wrote.

Day also admitted to shooting the girl with a air soft gun from close range.

In court, Day’s attorney, Emily Shallcross, told the judge that Day was “taking responsibility for his actions.”

He was sentenced to 18 months in jail on one of the indecent assault and battery charges. On the remaining charges he was sentenced to three years of probation with conditions that he submit to GPS monitoring when released from jail and that he have no unsupervised direct or indirect contact with anyone under the age of 18 except for his biological children. He must also register as a sex offender.

The girl, who was present in court with her mother, did not speak during the hearing and instead submitted a written victim impact statement.

“We are very grateful to and proud of the victim in this case who came forward under difficult circumstances and persevered,” Assistant Northwestern District Attorney Caleb Weiner said in a statement. “We believe justice was served in this case.”

Emily Cutts can be reached at ecutts@gazettenet.com.