Mother Arrested for Infant Daughter’s Death

For Immediate Release: Monday, December 9, 2024

Gaithersburg, MD – Detectives from the Montgomery County Department of Police – Major Crimes Division have arrested and charged 37-year-old Mackenzie Rose Colgan, with the Sunday, December 8, 2024, murder of her 3-month-old daughter.

At approximately 12:12 p.m., the Montgomery County Emergency Communications Center (ECC) received a call from the victim’s father claiming Colgan had drowned their infant while giving the baby a bath.

Montgomery County Department of Police – 2 ^nd District officers and Fire Rescue Personnel responded to the 7300 block of Summit Avenue. The infant was transported to a local hospital where additional life-saving measures were attempted, but the infant was ultimately pronounced dead.

Major Crimes detectives responded to the scene, and during the investigation, Colgan was identified as the suspect.

The decedent has been transported to the Office of the Chief Medical Examiner in Baltimore, where an autopsy is scheduled for Monday, December 9, to officially determine the cause and manner of death.

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Detectives arrested Colgan at the scene, charging her with first-degree murder.

Colgan was transported to the Central Processing Unit, where she is awaiting a bond hearing.