Dayton police were dispatched around 6:03 p.m. to the 600 block of Saint Joseph Avenue, according to the city police incident report.
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A caller reported a man was taking photos of children on the playground in the back of the building.
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The Glen at St. Joseph campus includes an apartment complex for single mothers and an early learning center for their children.
The caller described the suspect as an older man, about 60 years old, with gray hair driving a navy blue vehicle, according to police.
A witness reported the suspect used a red camera for about five minutes before realizing he was being watched, and then leaving the area.
Police spoke with a security guard in the area who reported no children were seen playing on the playground in the surveillance video.
An estimated about 30 women with children live at the complex, according to police interviews with the security guard.
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