MINNEAPOLIS (WCCO) – An 18-year-old high school student from North Oaks, Minnesota, is accused of coercing a 12- and a 13-year-old girl into performing a sex act on him in an Arden Hills park.

Alexander Patrick Lindeke was charged with with two counts of criminal sexual conduct, in the first and third degrees, and arrested at White Bear Lake High School.

Lindeke met the 12-year-old on the website HotOrNot.com and persuaded her to film and send him a graphic video, according to the complaint.

“Unfortunately, there are still men in our community who think it is okay to exploit vulnerable young girls for their own sexual gratification,” Ramsey County Attorney John Choi said in a statement. “As a community, we need to get serious about how we educate our boys so they understand that girls and women are not sexual objects to be exploited, but must be valued and treated with respect.”

When the girl and her friend met him at Cummings Park, police say Lindeke threatened to publish the video if they didn’t perform a sex act on him in the back seat of his car.

In a separate incident, Lindeke is accused of threatening to publish a video of an underage girl exposing herself to him unless she sent him a photo of her 8-year-old sibling.

The 13-year-old girl picked Lindeke’s photo out of a six-person lineup.

Lindeke had enlisted in the Minnesota National Guard in late December and was scheduled to attend basic training in August.