The St. John the Baptist Parish Sheriff’s Office is investigating an early morning stabbing at a LaPlace residence that injured an off-duty St. Charles Parish Sheriff’s Office deputy and his girlfriend. The suspect, the brother of the victim, was arrested on scene shortly after the incident.
The suspect, identified as Anthony Manson, Jr., age 31, lived in the house with his brother, Aden Manson, age 21, who is employed as a Correctional Officer in St. Charles Parish, and other family members.
At this time it appears the attack was unprovoked.
At 1:26 a.m. Thursday, Sept. 24, 2026, St. John Parish Sheriff’s deputies responded to the 100 block of Devon Drive in reference to a stabbing. When they arrived on scene, several people were located outside the house; two of whom were bleeding from stab wounds.
Deputies were informed that the suspect was inside the residence armed with a knife. While two deputies rendered first aid to the victims including applying tourniquets, other deputies entered the house. Deputies observed Manson standing in a hallway with a kitchen knife in his hand. Manson complied with verbal commands to drop the knife and was arrested.
Aden Manson, and his girlfriend, age 20, reported they were asleep in bed when Manson kicked opened the bedroom door and attacked them with the knife; stabbing them repeatedly. They were able to escape and run outside the house.
The victims were able to alert three other adult relatives who were inside the house at the time. They were not injured.
The victims were transported to University Medical Center in New Orleans and are expected to recover.
Manson has been booked with two counts of aggravated second degree battery (felony) and is being held in the St. John Parish jail.