A Tennessee monster stabbed a woman and the infant son they shared to death in the midst of a bitter custody battle, according to a new report.

Enoch Zarceno-Turner, 25, was busted over the weekend for the Friday morning murders of Heather Cook, 32, and 4-month-old Bentley Cook in their southeast Shelby County home, WMC 5 Action News reported.

He stabbed the mother and son, then set fire to part of the house — apparently to cover up the homicide, according to an affidavit obtained by the station.

Zarceno-Turner was at one point in a relationship with Cook, and was Bentley’s father, according to the report.

The two had been arguing over custody, court documents obtained by the outlet reveal.

Cook’s family told the station that the woman had recently filed documents for child support, and a DNA test was ordered.

Zarceno-Turner had claimed he was in the area of the crime scene on Friday, and both mother and son were already dead when he arrived at the home, the court documents say. But he allegedly changed his story multiple times.

Zarceno-Turner’s family did not want to be interviewed after his court appearance, according to the report.

Cook’s sister was the one to find the lifeless bodies, FOX 13 Memphis reported.

Back on Aug. 31, according to the report, a Facebook account that looked to be Cook’s vented on a page for single mothers.

“When I got pregnant it was by someone I had just began seeing. When I told him I was pregnant, he asked me to ‘remedy the situation,’” the post said. “My son was born 4½ months ago and the father has never even attempted to see him.”

“He can’t believe that I’m asking for any support for a baby he helped to create,” the post continued.

Cook’s family confirmed the authenticity of the post to FOX 13.