In addition to tagging Incognito, Martin also mentioned Harvard-Westlake high school in his Instagram story, a school he once attended.
Law enforcement tells TMZ Sports.
Martin accused Incognito and Pouncey of bullying him in 2013 when they were teammates in Miami, which resulted in an National Football League investigation.
The post and arrests come over a week after 17 people were killed after a gunman opened fire at Parkland's Marjory Stoneman Douglas High School.
It appears that Martin may be mentally unwell as it seems like this picture could be construed as a threat against Incognito and Pouncey, as well as his former high school, the Harvard Westlake School in Los Angeles.
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The image from Martin's verified Instagram account is about as scary as it gets.
Martin was taken into custody on Friday afternoon.
"When you're a bully victim & a coward, your options are suicide, or revenge", the text of the post reads. Martin was taken in the second round of the 2012 NFL Draft but after the NFL's investigation into the bullying matter, Martin was traded from the Dolphins to the San Francisco 49ers.
That launched an inquiry that lasted months by NFL-appointed investigator Ted Wells, who determined that Pouncey, Incognito and Jerry engaged in a pattern of abuse.
The prestigious private school closed down its campus in the wake of the threats. Martin left the team abruptly and later said that he was under psychological duress and had considered suicide. Martin never played a down with the Panthers. He was also apparently the victim of bullying at Harvard-Westlake.
"You learn to tone down your size & blackness by becoming shy, introverted, friendly, so you won't scare the little rich white kids or their parents", Martin wrote, according to the Times.