Martin has said he was subjected to bullying in high school and by teammates in the National Football League, and he posted an image of a shotgun and shotgun shells on his personal Instagram account, the New York Post reported, adding that the account was verified. In 2013, he accused then-Dolphins teammate Richie Incognito of bullying, leading to Incognito's suspension. It was not immediately clear whether Martin posted the photo himself and he was not under arrest Friday afternoon.
USA Today reports that Harvard-Westlake High School sent an alert to students before school on Friday, telling them the school was closed.
The Harvard-Westlake prep school was evacuated earlier Friday after officials were made aware of the post. The threat was taken so seriously that the school was shut down for the day.
"The individual we believe responsible for the social media post in question has been detained and our investigation is ongoing", the LAPD said in a statement.
Miami Dolphins tackle Jonathan Martin looks up from the bench during the second half of an NFL football game against the New England Patriots on December 2, 2012 in Miami. "It takes away from your self-confidence, your self-worth, your sanity". "Everybody is calm, a lot of people are leaving now, everything is under control".
This comes in the wake of a horrific school shooting only days ago at Marjory Stoneman Douglas High School in Parkland, Florida. Matt Yam, a student at the school, is quoted by the L.A. Times as saying, "Honestly it's not bad".