Richard Cox, a registered child sex offender who identifies as transgender, will appear in court Monday for a hearing on alleged indecent exposure at a fitness center and two Virginia schools.

Cox, 58, is facing more than 20 charges in Arlington County, where he is in female locker rooms.

The incidents reportedly occurred at several locations, including the Barcroft Sports and Fitness Center, Washington Liberty High School, and Wakefield High School. These schools have pools that are open to the public after school hours.

Why did Arlington Public Schools allow a male sex offender to use the girl’s locker room at Washington-Liberty High School?

Why didn’t the Arlington School Board members respond to the women and address the problem?

Is the Arlington School Board in favor of allowing men to use APS girl locker rooms if they identify as transgender?

"APS permits pool patrons to access restrooms and facilities that correspond to their gender identity. We take every report of concerning or unsafe behavior very seriously and do not tolerate behaviors from any individual who is threatening or making others feel unsafe. APS responded to all patron concerns related to this matter in a timely manner and took appropriate and immediate action to investigate, notify law enforcement, and prevent the individual from returning to our pool facilities," an Arlington Public Schools spokesperson told WJLA.

WJLA was also the first to report that at two Planet Fitness locations in Fairfax County last summer. Concerns have been raised about the possibility of occurring again, given Cox's past offenses.

Cox is a Tier III sex offender, according to court documents. Tier III offenses are the most serious type of sex offense with a required registration period of life.

Cox's hearing is scheduled for 10 a.m. Monday. Arlington County Commonwealth’s Attorney Parisa Dehghani Tafti’s Office is handling the prosecution of Cox.

Editor's Note: This story is developing. Stay with WJLA for the latest updates.