Prosecutors said Hallgrimson threw the handcuffed Zicarelli to the ground, punched him in the face and told him, "You deserve to die," after returning from the rescue mission to the Greenwood, Missouri, police station. Zicarelli had walked into the police station in December 2018 and said he had tried to drown his 6-month-old daughter in a nearby pond, police said.
Hallgrimson and another officer rushed to the pond and found the unconscious infant floating face up and her lungs filled with water. Hallgrimson and the other officer worked to warm and revive the baby until paramedics arrived and rushed her to a hospital, where she was treated for severe hypothermia.
Hallgrimson was put on administrative leave shortly after being accused of assaulting Zicarelli, which prosecutors say was captured on video. He resigned in May 2019.
Zicarelli remains in Jackson County jail on pending felony charges of domestic assault and child abuse.