An Instagram post from a former NFL player, who was allegedly bullied while in the league, led to a school lockdown on Thursday. The New York Post reports previous Miami Dolphins lineman Jonathan Martin posted a picture of a gun and bullets alongside a cryptic caption.

“When you’re a bully victim and a coward, your options are suicide or revenge,” the 28-year-old wrote.

Martin included the name of the Florida high school he attended as well as his former team. He positioned the names atop the gun. In 2013, Martin resigned from the Dolphins after the team’s offensive lineman Richie Incognito allegedly racially bullied the player. He was taken into police custody on Friday.

Following the massacre at Marjory Stoneman Douglas High School last Tuesday, there has been a surge of reports of school shooting threats.