Male Arrested After Overnight Stabbing in St. Catharines

On Tuesday, December 23, 2025, at approximately 12:25 AM, uniform officers with the Niagara Regional Police Service (NRPS) 1 District (St. Catharines/Thorold) along with Niagara Emergency Medical Services (NEMS) were called to the area of Church Street and William Street, in St. Catharines, for a report of someone being stabbed.

Officers arrived on scene and located a 23-year-old male suffering from a stab wound.  That male was transported to an out-of-region hospital.  His injuries are considered not life-threatening.

A perimeter was set-up in the downtown St. Catharines area, and with the assistance of NRPS K9 units, a male suspect was located and arrested.

57-year-old David PENNER of St. Catharines has been arrested and charged with Aggravated Assault.

PENNER remains in custody and is scheduled to attend a bail hearing Tuesday, December 23, 2025, at the Robert S.K. Welch Courthouse, located at 59 Church Street in St. Catharines.

NRPS 1 District Criminal Investigations Bureau (CIB) has taken carriage of the investigation. Detectives are asking for anyone in the Church Street and William Street area, who may have video surveillance between midnight and 1:00AM, to contact them.  Anyone with information related to this incident is asked to contact the Niagara Regional Police Service’s 1 District CIB (St. Catharines/Thorold) at 905-688-4111, option 3, ext. 1009610.

Members of the public who wish to provide information anonymously are encouraged to contact Crime Stoppers of Niagara online or by calling 1-800-222-TIPS (8477). Crime Stoppers offers cash rewards to persons who contact the program with information that leads to an arrest.

NRPS Incident 25-147868