A 17-year-old trespassing at Newfield High School was chased by school security Monday, police say. 

A student tells News 12 Long Island that the male teen sat in the cafeteria for "five periods straight" after entering the school at the beginning of the day. 

A student took a cellphone video of the student fleeing security after hopping a fence. 

Some parents say they were not bothered by the breach. 

"Security is pretty tight, but you can't check everybody," says Jean Foot. 

Others call the incident troubling. 

"Look what happened in Las Vegas. Who's to say that kid didn't have a gun on him? You wouldn't know," says Bonnie Weber.

Weber says she found out about the incident from her child. 

"The school, they didn't say anything. They didn't call us to tell us anything about it," she says.

The district says they followed their security protocols by contacting Suffolk police, who then escorted the teen off school property. The teen was charged with trespassing.