Utah man is charged with killing 2-year-old boy, and badly injuring his twin sister

ROY, Utah– A Utah man who served two years in prison and broke a child's arm seven years ago was charged Friday with killing a 2-year-old boy and seriously injuring his twin sister, Weber County prosecutors said.

Jonathan Allen Dunn of Roy is charged with aggravated murder, aggravated child abuse and two counts of aggravated sexual abuse of a child. The aggravated murder charge carries the possibility of the death penalty, court records said.

Dunn, who told officers he was babysitting the children, called 911 Thursday morning to report the boy was not breathing, according to an affidavit supporting the allegations.

After his arrest, Dunn, 36, acknowledged hitting the children in the back, sides and chest Wednesday night, saying “he hit them harder than he should have,” according to court records.

He also reported pinching the children and pushing them against a door frame, court records said. He said he gave them both Tylenol, gave the boy a cough medicine and the girl a children's sleeping pill.

Friday morning, the boy was wheezing and Dunn said he gave him more cough medicine. Between 8:30 a.m. and 9 a.m., the boy stopped breathing, officers said Dunn told them.

Both children had bruises all over their bodies and the girl was taken to the hospital to be treated for a brain hemorrhage, court records said.

Dunn, who did not list an attorney in court filings, was ordered held without bail and will make an initial court appearance on Dec. 26.

Dunn was sentenced in May 2017 to one to 15 years in prison for breaking the arm of a child he left in his care in 2016. He was released from prison in April 2019 and was on parole until December 2021, Utah Department of Corrections officials said.