A Connecticut man was arrested Monday night after police caught him spying through a bedroom window of  a next-door neighbor.

Milford police responding to a tip that 42-year-old Brian Bullett had been spying on a teenager, staked out his home and watched him as he walked down a narrow alley that separates his house from the two-unit apartment where the teenager lives.

As he was standing by the girl’s bedroom window with his nose pressed against pane, police arrested him and charged him with disorderly conduct and simple trespass.

Authorities say he will not have to register as a sex offender since no photos or recorded images were made.

It is unclear how long Bullett had been looking into the girl’s bedroom window.