PITTSBURGH — A suspended Plum High School teacher has been found not guilty of intimidating a female student who accused another teacher of having sex with her, allegedly by pointing out the girl in class last year.

The Allegheny County jury deliberated for less than an hour before acquitting Drew Zoldak, 41, of a single witness intimidation count.

Zoldak, a forensics teacher at Plum was arrested last year as police and, eventually, a grand jury investigated alleged sexual misconduct involving three other male teachers and three female students.

Zoldak’s accuser — who also told police she had a sexual relationship with Joseph Ruggieri, 39, the teachers’ union vice president — testified she felt intimidated when Zoldak pointed her out in class in April 2015.

She testified Zoldak was explaining to his class that he missed their previous session because he had to meet with detectives — who he called “men in suits” — and gestured toward her by moving his head and saying, “Because of her.”

Several students called by the defense testified they felt Zoldak’s comments were innocuous.

Defense attorney Alexander Lindsay Jr. of Butler argued to the jury on Monday that, even if the incident occurred the way prosecutors described it, they hadn’t proved Zoldak was trying to intimidate the girl into not cooperating with the Ruggieri investigation. Ruggieri has since pleaded guilty and is serving two to five years in prison.

Another teacher, Jason Cooper, 39, also has pleaded guilty to having sex with a different female student and is serving 18 months to three years in prison. Former substitute teacher and athletic coach Michael Cinefra is awaiting trial on charges he had sex with yet another student. He has pleaded not guilty.