Saskatoon city man already accused of stalking drivers with hidden GPS tracking devices now faces another 32 criminal charges, bringing the total against him to 95 charges.
Saskatoon Police Service (SPS) alleges Marty Glenn Schira, 46, slipped magnet mounted GPS units under bumpers and inside fender wells so he could watch where victims travelled.
Investigators believe more than 100 trackers were used between last fall and early this year.
The new charges, laid on Tuesday in provincial court, mirror earlier allegations of harassment, mischief, intimidation, unauthorized computer use, and fraudulent concealment of a computer system.
Seven new complainants have stepped forward, bringing the number of known victims to 23.
SPS believes there could be further victims.
The case began on September 6, 2024, when a motorist discovered two strange devices clinging to his vehicle and called police.
A search of an apartment on Twentieth Street West later turned up several similar units wrapped in black tape.
Schira was first charged in January, then again in March.
Schira made a brief phone appearance on the latest information and remains in custody ahead of a May 6 court date.
Detectives warn at least 10 trackers may still be on the road.
Officers urge drivers to inspect bumpers, rear fender walls, and areas near the tires.
Anyone who spots a suspicious gadget should leave it in place and bring the whole vehicle to SPS so evidence is preserved.
Court records show Schira served 13 years for a 2003 kidnapping and sexual assault and was once assessed as a moderate-to-high risk to re-offend sexually.
The GPS investigation is ongoing, and SPS says more charges could follow as they work to find additional devices and potential victims.