Registered sex offender headed to federal prison

KALAMAZOO, Mich. (NEWSCHANNEL 3) - A registered sex offender is heading to federal prison for 40 years.

34-year-old Derik Rothrock of Kalamazoo was sentenced Monday.

Court documents say he convinced three girls, ages 12, 14, and 15, to text him naked photos in July of last year.

Rothrock was already convicted of criminal sexual conduct in 1998.

He will be under lifetime federal supervision when he's released from prison.