The gun-toting Michigan maniac who killed five people before turning up dead Friday had a history of domestic abuse and was locked in a bitter divorce battle, court records show.

Chad Hickman’s final social media posts blasted his ex-wife’s “b–lshit” allegations amid their failing marriage, which included her reporting to police his history of child abuse.

The details of the case aren’t entirely clear, but Hickman, 39, was sentenced to a year in jail after being convicted in 2024 of fourth-degree child abuse and contributing to delinquency of children in connection with a 2010 criminal case, according to court records.

The court, however, dismissed other charges he was facing, including two counts of first-degree criminal sexual conduct.

It is unclear how many kids the couple had together.

Katie Hickman, who now goes by Katie Frye, fumed Saturday that prosecutors let her ex-husband walk, allowing for the senseless tragedy that claimed the life of a teenage boy and his mother.

“Missaukee county needs to be held responsible for the death of this child and the other victims! Six people are dead and one child is in critical condition,” Frye slammed on Facebook Saturday.

“Missaukee county prosecutor and Judge Ransom let this man walk free after everything he did to my children and I and then when he was released he was allowed to continue to torment us and no one stopped him and now innocent lives were taken.”

Frye had alleged in divorce filings that Hickman was inherently violent and that their marriage was “characterized by control, coercion, and fear,” according to the documents.

She also claimed she was forced to bear the brunt of the financial burden with Hickman only working for one year during their 12-year marriage, despite Frye dealing with injuries that limited her own ability to work.

Hickman also allegedly stole cash that the couple planned to use to renovate a rental property they shared.

“She testified that she lacked access to financial resources and marital assets and was compelled to make decisions and commitments under threats of harm, including physical violence, sexual assault, and financial control,” court papers said.

Friends and family testified that both Hickman and Frye were violent toward one another in what the judge described as a “toxic” relationship that was “defined by volatility.”

The judge ordered the marriage to be dissolved in July 2025 — and the case was still moving through the courts at the time of his deadly rampage.

The pair were due in court for a hearing on Sept. 1, a docket shows.

“Everything my ex wife said about me was a lie and I have proven that in front of 3 different honorable judges,” Hickman railed in an October Facebook post in which he shared the judge’s 16-page opinion.

“Katie Hickman told all those lies about me simply as part of an orchestrated hit to take literally everything we owned in the divorce after her many attempts of blackmailing me didn’t work.”

He added in the post that “Leaving Katie was the best thing I ever did, despite every evil thing she threw at me I’ve never been happier.”

It’s not clear if the legal battle played a part in Friday’s murders.

Hickman, who had a large tattoo of a gun on his thigh, opened fire around 11:40 a.m. in a home, leaving three dead and one in critical condition, cops said.

Two more slain victims were later found — one in the woods near Whitlock Lake and another in a separate home, according to state police.

A manhunt was ignited to find Hickman, with police warning that he should be considered armed and dangerous.

He was eventually found dead in the wooded area near the lake, though it wasn’t immediately clear how he died.

Cops are still trying to piece together the gunman’s motive. The names of his victims had not been released by police as of Saturday afternoon.