WASHINGTON — A former Charles County middle school aide accused of sexually assaulting students and creating child pornography from the assaults was involved with youth in capacities beyond the school, the sheriff’s office said Wednesday.

Carlos DeAngelo Bell, 30, was indicted Friday and charged with the sexual abuse of two male children. Bell recorded the abuse of the middle school students in a classroom, at his home and at other locations between February and March 2016, officials said.

Bell was an instructional assistant at Benjamin Stoddert Middle School before he was removed in December. He also served as the head indoor track coach at LaPlata High School.

On Wednesday, the Charles County Sheriff’s Office said Bell worked at several other places where he had contact with children, including a variety of coaching opportunities throughout the region.

In 2008, he worked at the Charles County Department of Community Services.

In 2015, he worked for a company that provided before- and after-school care for children at J.P. Ryon Elementary School and William B. Wade Elementary School.

In 2016, Bell volunteered as an assistant coach for a track club called Comets, in Waldorf.

Charles County Sheriff’s Office released the information so parents can talk with their children who were coached by Bell and see whether he made inappropriate contact with them. The FBI established a tip line for information about the case: 1-800-CALL-FBI.

Bell told investigators that he is HIV-positive, and officials fear he could have exposed the children to the virus. Seven victims have been identified, and police are working to identify another three children who might also be victims.