The Pima County Sheriff's Department has arrested a man who was posting disturbing and inappropriate messages on Facebook directed toward minors, according to a news release.
Detectives with the Crimes Against Children Unit launched an in-depth investigation into the person behind the posts.
PCSD says on Friday with assistance from the media and the community, they obtained evidence to arrest 28-year-old Alan Anthony Dallman.
Dallman is being charged with Furnishing Harmful Items to a Minor, a class 4 felony.
He was arrested at his home near the 2700 block of West Dorado Circle and is being booked into the Pima County Adult Detention Complex.
Deputies say the investigation is ongoing.
"We would like to thank the community for coming together to help keep the children and the citizens of Pima County safe," PCSD wrote in the news release.