A Marine in Jacksonville, NC, has been arrested in the death of his four-month-old baby, according to police.

Officers arrested Christian Mark McGill after responding to a call on Dec. 22 for someone who had trouble breathing, according to Jacksonville police.

First responders tried to revive the unconscious infant, who paramedics declared dead at the scene.

McGill, an active duty Marine, was arrested on Dec. 30 and is being held at Onslow County Jail without bond. The baby’s death is being investigated by the Jacksonville Police Department and District Attorney’s Office, and the Naval Criminal Investigative Services.

The Onslow County Jail and district attorney also did not respond to messages.