A Brooklyn Tech High School teacher arrested a month ago by police for allegedly sending nude photos to a student is facing new allegations.

Investigators say Sean Shaynak victimized six other teenage girls and now faces charges that include kidnapping and sex crimes.

Prosecutors say Shaynak took a 15-year-old to a nude beach in New Jersey without her parent's consent, performed a sex act on an 18-year-old student without her consent and sent photos of his genitals to four students, including two minors.

Investigators say he also touched students inappropriately and kissed them, grabbed the backside of a minor, and gave alcohol and cigarettes to others.

His charges include kidnapping and committing a criminal sexual act, among other offenses for allegedly victimizing the six girls, who range in age from 13 to 19, between 2011 and 2014.

Prosecutors say the indictment stems from a search warrant executed at Shaynak's home following his August arrest.

Shaynak could face up to 25 years in prison for the top charges.