The Los Angeles Times confirmed that it was because of Martin - a 2008 graduate of the school.
Los Angeles police spokesperson Tony Kway told USA TODAY Sports that officers from the department's North Hollywood division responded to the school "after an Instagram post by a former student who is now an adult". He also detailed his struggles in football and at Harvard-Westlake. The official says Martin was being questioned and was not under arrest Friday afternoon.
According to KTLA, the main campuses of the California preparatory school closed on Friday in response to "a possible security threat posed on social media".
Incognito was suspended for bullying Martin, other teammates and a team employee. "We are working closely with law enforcement and will share more information when we are available". The investigation determined that Incognito, Pouncey and John Jerry engaged in a pattern of harassment directed at Martin and another young offensive lineman identified as Player A in the Ted Wells report. He was ultimately taken into custody at the hospital after attempting to check in for treatment, hours after making a disturbing social media post that prompted an area high school to close as a precaution. In wake of the tragedy at Parkland, Florida's Marjory Stoneman Douglas High School, Harvard-Westlake made a decision to shut down today as a result of the photo.More news: TL; DR: Mahi woke up, jests Pandey of Dhoni onslaught
The Instagram post and the school shutdown comes amid heightened sensitivity towards the issues of gun violence and violence in school's following last week's school shooting at Marjory Stoneman Douglas High School in Florida which took 17 lives.
"There was also a reference to "#MiamiDolphins" on the gun.
Martin's post was made on Instagram as a story either Thursday night or Friday morning. He declined to confirm that the man is Martin or to explain the meaning of "detained", which he said does not necessarily mean Martin is in jail or police custody.
Martin, who previously revealed he tried to commit suicide multiple times while in the NFL, was the victim in a bullying scandal that rocked the league. "Neither black nor white people accept you because they don't understand you".