BRUNSWICK, Ga. -

A jury has convicted a man of beating and killing his girlfriend's 17-month-old child in Brunswick in 2009.

The Brunswick News reports that a Glynn County Superior Court jury on Thursday convicted 35-year-old Daryl Jones of beating and killing Brianna Hester.

Judge Anthony Harrison sentenced him to life in prison.

Authorities said the child's mother, Kimberly Hester, had been romantically involved and living with Jones when the child was killed.

Police arrested Jones four days after paramedics found Brianna bruised and unresponsive April 30, 2009, on the living room floor of an apartment on Lantana Court.

Police said Brianna was transported to the Southeast Georgia Medical Center, then airlifted to Savannah Memorial Hospital, where she died.

According to police, Jones was taking care of his three children and Brianna when the girl stopped breathing.

An autopsy conducted at the Georgia Bureau of Investigation crime lab in Savannah indicated trauma to the head.