Police: Montgomery Co. high school guard busted for sex with student

WASHINGTON — A Montgomery County high school security guard has been taken into custody for having sex with the same 17-year-old female student he was ordered to stay away from in early April, police said.

Mark Yantsos, 57 of Gaithersburg, who was on administrative leave as security chief at Richard Montgomery High School, was arrested Friday, according to Montgomery County police.

Yantsos faces charges of sex abuse of a minor and fourth-degree sexual offense.

Under charges filed in April, Yantsos was accused of carrying on a sexual relationship with the girl and providing her gifts — including an iPhone7 and a diamond pendant.

He was released on $75,000 bond and ordered to have no contact with the girl or any other minors.

But Montgomery County State’s Attorney John McCarthy secured an emergency order to revoke Yantsos’ bond.

Court documents charge that Yantsos violated the terms of his bond by holding numerous meetings with the girl in late April and early May.

Police said Yantsos was rearrested Friday after his multiple meetings with the teenager, including a five-hour stint Thursday in which he’s accused of having sex with the girl.

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