PRINCE FREDERICK, Md. — On April 29, 2026, at approximately 11:38 a.m., deputies from the Calvert County Sheriff’s Office (CCSO) responded to the 1600 block of Mint Court in Prince Frederick for a reported infant cardiac arrest.
Upon arrival, deputies located an unresponsive juvenile victim inside the residence. Deputies observed injuries to the infant consistent with an apparent assault and immediately began life-saving measures until emergency medical personnel arrived. The victim was transported to CalvertHealth Medical Center and subsequently transferred to an area trauma center with life-threatening injuries.
Detectives from the CCSO Criminal Investigations Bureau responded to the scene and assumed the investigation.
As a result of the preliminary investigation, an adult male, identified as Branden Pernell Mackall, 35, of Prince Frederick, was arrested at the scene. Mackall was transported to the Calvert County Detention Center and charged with the following offenses:
• First-Degree Assault
• First-Degree Child Abuse (Severe Physical Injury)
• Second-Degree Child Abuse
This case remains under investigation.