St. Mary’s County Sheriff’s Office deputies and Emergency Medical Servces personnel responded to a residence on Redford Lane in Lexington Park on Dec. 23  at 7:09 a.m. for a 4-month-old male not breathing. First responders immediately began CPR and the infant was transported to MedStar St. Mary’s Hospital by ambulance. At 8 a.m. the infant was pronounced dead by emergency room doctors.

Detectives from the Criminal Investigations Division responded and assumed the investigation.

Additional details will be released as they become available.