Police say Curtis Jack admitted that he added antifreeze to his newborn daughter’s milk to avoid paying child support.

A Georgia father was sentenced to 50 years in prison on Thursday for using antifreeze mixed in breastmilk to poison his 18-day-old daughter four years ago.

Curtis Jack was arrested on Oct. 16, 2020, after his daughter became sick and tested positive for ethylene glycol — a chemical found in antifreeze.

Investigators said Jack had picked up bottles of breastmilk from the child’s mother two weeks earlier while she was hospitalized after giving birth to their child.

“After delivering the breastmilk to the child’s grandmother, who was also caring for the woman’s other daughter, the child became critically ill within 24 hours, suspected of being poisoned. Jack admitted to adding antifreeze to the breastmilk to South Fulton Police Department detectives,” police said in a statement on social media.