Police in Warren County say a 3-week-old baby, who died last week, was killed by his mother.

An autopsy shows Braydon Eichlan died of blunt force trauma to the top of his head. Court papers reveal Sarah Eichlan, 23, was alone with her son inside her Phillipsburg apartment on April 23. The prosecutor?s office said on the morning of April 24, Eichlan called police saying that her son was not breathing.

Neighbors say Eichlan lives with her boyfriend and his two children from a previous relationship.

Eichlan was arrested and charged with aggravated manslaughter Thursday. She is being held in the county jail on $500,000 bail. If convicted, Eichlan faces up to 30 years in prison. She is scheduled to be arraigned on May 5.