MESA, AZ (3TV/CBS 5) -- A Mesa mother woke up early Thursday morning to see a man staring at her from outside her window. Sonya Duncan said it happened at about 5:30 a.m. and still very dark out.
"I opened up the curtains. I saw the man standing [there]," she said. "Basically, we were face-to-face with just the window between us."
[WATCH: "He had his pants partially down."]
She said they locked eyes, but the man lingered rather than running away. "Not only was he looking in the window, but he had his pants partially down," Duncan said.
Her adult children were alarmed and sprang into action. Her daughter called 911, while her son chased after the guy in the neighborhood of Stapley and University drives. "My son kind of like tackled him to the ground, and tried to keep him from fleeing," Duncan said.
Mesa police officers arrested 51-year-old Javier Sanchez. Court documents say officers did not know if Sanchez was drunk or high at the time of the incident, but Duncan said officers did know who he was.
"They had been called earlier on in the morning," she explained. "I guess this man had been knocking on windows." Police believe Sanchez had been peering into windows at a nearby apartment complex that same morning.
Duncan said she's now more aware of her family's safety. "I stapled the curtains together in the middle, and then I also stapled them to my wall," she said. "Although he wasn't inside the home, it still was an invasion of our privacy. We should not have to worry about our curtains being open a little bit; you should be able to be secure in your home."
Sanchez was arrested on suspicion of trespassing and voyeurism.