The New Jersey cop accused of fatally beating his infant daughter had nine skull fractures from ongoing abuse, court documents said.

Daniel Bannister, a Ewing Police Department officer, was charged with the murder Thursday of his 3-month-old daughter Hailey, NJ.com reported.

The months-long investigation into the baby’s death on Dec. 11, 2018, determined that her injuries were consistent with ongoing abuse, which was indicated by her multiple skull fractures, some of which were in the process of healing, authorities said.

Investigators believe that Hailey also suffered four fractured ribs weeks before her death, according to the news outlet.

“The nature of Hailey’s injuries indicated an ongoing pattern of abuse,” Mercer County Prosecutor Angelo Onofri said in the statement.

Hailey was brought to the hospital when her mother, Catherine Bannister, called 911 on Dec. 5, 2018, to report the baby was having difficulty breathing.

Doctors determined that the baby had suffered from a fractured skull, brain bleeding and fractured ribs. The infant later succumbed six days later to her injuries.

Authorities confiscated both parents’ phones which revealed that Catherine confronted her husband on several occasions about how he handled their daughter. When the baby was one month old, Catherine questioned Daniel about the bruising on Hailey’s face in a series of texts, NJ.com reported.

She also sent her husband a photo showing bruises on Hailey’s ribs on another occasion. “Hopefully doctor won’t see,” she allegedly texted.

Catherine, 29, was charged Thursday with endangering the welfare of a child. Both she and Daniel have pleaded not guilty.

Ewing Police had placed the father on paid suspension following the baby’s death — but as of Wednesday, his status has changed to leave without pay, according to the department.