Osceola County Sheriff's Office detectives Sunday charged Troy Michael Campbell, 15, with written threats to kill or do bodily injury after it was discovered Campbell posted threatening comments on the Internet.

The investigation began Friday when the Sheriff's Office received a phone call from an individual claiming he saw an Internet posting of a shooting that would take place on Monday at Poinciana High School. Working in conjunction with the FBI and Osceola County School District, detectives discovered that Campbell, a former Poinciana High School student who recently moved to McAllen, Texas, after being expelled made the threats on an Internet site.

On Saturday, Osceola County Sheriff's Office detectives contacted McAllen Police Department detectives who brought Campbell in for questioning. Campbell, who cooperated with the investigation, told detectives he was recently expelled from Poinciana High School for releasing mice into the cafeteria. Just recently he moved to McAllen.

On Friday, Campbell posted a message claiming he had high-powered guns in a school locker and was going to target certain students at the school on Monday. Campbell told detectives it was a prank and, in actuality, he did not own guns nor did he intend to harm anyone.

Detectives made contact with the students Campbell referenced in the Internet posting and, based on the information, Campbell was arrested and booked into a juvenile detention center in McAllen.

Detectives have confirmed the threats were not viable, but as a precaution, additional deputies were at Poinciana High School Monday to ensure the safety of the students, parents and teachers. In addition, School District officials Sunday evening used an automated phone system to notify parents whose students attend Poinciana High School about the incident.

Written threats to kill or do bodily injury is a second-degree felony, which can carry a prison term not to exceed 15 years or a fine of up to $10,000.