Man charged in 2024 Smithville murder now faces 25 child sexual abuse-related offences

Niagara police have charged a man allegedly involved in the murder of a Smithville woman with 25 additional child sexual abuse-related offences.

Joseph Villneff of West Lincoln was initially arrested in October 2024 and charged with the first-degree murder of Cathy Prosje. The 62-year-old woman was found dead on April 26, 2024 in her Smithville home that she shared with her sister.

Cathy’s sister — 56-year-old Carolyn Prosje — was also arrested in January 2025 for accessory after the fact to murder; her charge was later upgraded to first-degree murder.

READ MORE: Sister of woman killed in Smithville now charged with first-degree murder

In June 2025, following another internet child exploitation investigation, Villneff was also charged with voyeurism and possession of child sexual abuse and exploitation material.

Investigators say they found more sexual abuse-related content in September of last year, leading to more charges being laid against the 44-year-old man on Tuesday.

Police say Villneff is facing 25 offences, including seven counts of making child sexual abuse and exploitation material and four counts of sexual assault under 16 years of age.

READ MORE: Niagara police arrest man connected to Smithville homicide

Villneff remains in custody and is scheduled to appear in court on Jan. 28 at the Robert S.K. Welch Courthouse in St. Catharines. Police say further charges may be laid as the investigation continues.

Officers believe there may be other victims and ask anyone with information related to this case to contact the Niagara Regional Police Service at 905-688-4111, option 3, ext. 1009535.

Members of the community who wish to provide information anonymously can contact Crime Stoppers of Niagara online or by calling 1-800-222-8477(TIPS).

READ MORE: Man charged in Smithville homicide also facing child porn offence