BAY COUNTY, Fla (WMBB)- PCBPD has released more details about the hard lockdown at Arnold High School last week. According to the incident report, multiple students reported seeing another student post on social media that they had a firearm and planned to use it in a school shooting. When law enforcement arrived on scene just after 11 a.m., they found the suspect had not checked out of school but was seen leaving, according to a witness.