Police say the picture was posted on the window of a Coach Street business.

CANANDAIGUA — An investigation that began about a week ago by Canandaigua City Police led to an arrest Thursday over a pornographic picture posted on a downtown business.

Police charged William Stewart, 74, of Canandaigua, with public display of sexually explicit material. Stewart is scheduled to appear in City Court at a later date.

Police Chief Stephen Hedworth said Monday the pornographic picture was from a magazine and attached to the outside of a window at Farmers Inn on Coach Street. The man was identified because the activity was caught on security camera, according to the chief.

About 15 security cameras have been up and running for about six months throughout the city, Hedworth said, noting, “They are instrumental in investigations.” The cameras have helped police identify suspects and investigate everything from hit-and-run motor vehicle accidents to criminal mischief and other incidents, he added.

While the cameras are a “very valuable tool,” Hedworth said, the information they provide doesn’t necessarily lead to an arrest. For example, police continue to investigate the shooting that happened May 13 outside the V-Pub at the Villager. That includes reviewing all the surveillance footage obtained from the area of the shooting that took place in the parking lot of the South Main Street establishment late that Saturday night. Police are interviewing people who may have witnessed the shooting or who have information. The victim, a 32-year-old man not from Canandaigua, is recovering from gunshot wounds in the upper body and lower leg.

Anyone with information regarding the recent shooting or any suspicious activity in the city is urged to call the City Police Department at 585-394-3311 or 585-394-4560.