Heuermann, living just across South Oyster Bay from where the bodies of 11 victims were discovered, was detained late on Thursday in Massapequa, disclosed an unnamed law enforcement source.
A 15-year-old girl from Guatemala, whose identity has not been disclosed by the authorities, succumbed to a severe, pre-existing illness on Monday while under the government's protection.
"The findings of our statewide survey and other reports make it clear that Meta platforms are the preferred social media applications for human traffickers looking to prey on vulnerable people," Florida's attorney general said.