A 40-year-old man in Montana will likely spend the rest of his life behind bars for killing his 4-year-old stepson, beating and immersing him in a scalding hot bathtub until he died back in 2021. Yellowstone County District Court Judge Collette Davies on Wednesday ordered Kristopher Michael Harasymczuk to serve 80 years in a state correctional facility for the slaying of young Jaxsynn Gatlin.

Specifically, Davies sentenced Harasymczuk to 80 years on one count of intentional homicide and 15 years each for counts of assaulting a minor and tampering with evidence, with all of the sentences to run concurrently, meaning at the same time. He was convicted in March following a jury trial.

The boy”s mother, 37-year-old Lana Marie Harasymczuk, on Tuesday was also charged in connection to her son’s death. She is facing three counts each of child endangerment and tampering or fabricating physical evidence.

According to a report from the Billings Gazette, officers with the Billings Police Department and emergency medical personnel responded to the family’s home on Woodgrain Drive on Oct. 22, 2021 regarding an unresponsive child. Upon arriving, first responders said they found Jaxsynn on the ground in the bathroom next to the bathtub.  Medics noted that the child was already dry when they arrived and his skin was warmer than normal.

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The boy was rushed to a local hospital where he was pronounced dead a short while later. An autopsy determined his death to be a homicide with the likely cause of death being hyperthermia, noting that on the day of his death the child’s temperature reached 102 degrees. Bruising was also noted on the boy’s face and other signs of abuse.

In subsequent interviews with Jaxsynn’s siblings, all of them reportedly confirmed that they had been physically abused by Kristopher Harasymczuk.

The boy’s mother initially claimed that Jaxsynn had gone to take a bath by himself, asserting Kristopher Harasymczuk was not present and that her son fell and drowned on his own, Great Falls, Montana CBS affiliate KRTV reported. However, after being confronted with signs of abuse, she reportedly confessed that her husband was the last person in the bathroom with the victim before he died and that just prior to his death, she heard the boy screaming.

“This is the worst one I’ve been involved in for sure,” John Ryan, Yellowstone senior deputy county attorney, told jurors, according to KRTV.

Billings, Montana CBS affiliate KTVQ reported that in addition to hyperthermia, Jaxsynn’s cause of death could have been blunt force trauma to the head or swelling caused by drowning.