EL DORADO, Kan. (AP) — Social media posts claiming to be from an 11-year-old Kansas boy who vanished in 1999 are a hoax perpetrated by an ex-employee of the Butler County Sheriff's office, the sheriff said Monday.

"I'm very comfortable in saying this is a hoax. This is not Adam Herrman," Sheriff Kelly Herzet told The Wichita Eagle.

Herrman disappeared in 1999 from a home near Towanda where he lived with his adoptive parents but he wasn't reported missing until 2008.

Tweets from a person claiming to be the boy began Saturday night and were tagged to news media. Two videos showed up Sunday on Yo...