Ex-NFL Player Sergio Brown Arrested in Connection with Mother’s Death Weeks After He Went Missing: Report

Sergio Brown and his mother Myrtle Brown were reported missing by family members on Sept. 16, and Myrtle was later found dead

Former NFL player Sergio Brown has been taken into custody in connection with the September death of his mother, CNN reports, citing a law enforcement source familiar with the investigation.

The news comes three-and-a-half weeks after family members reported Brown and his mother Myrtle Brown missing on Sept. 16, NBC Chicago reported. The same day, police in Maywood, Ill., discovered the body of the 73-year-old near her home, but the former football player was not located, according to the outlet.

The Cook County Medical Examiner's Office told PEOPLE that Myrtle’s death is being investigated as a homicide, and that she died as a result of "multiple injuries due to assault."

Brown played in the NFL for six seasons, signing with the New England Patriots in 2010 and retiring following the 2016 season, during which he played for the Bills.

Related: What We Know About Case of Missing Ex-NFL Player Sergio Brown, Whose Mom Was Found Slain

According to CNN, Brown went to Mexico after he was reported missing and was deported Tuesday from the country and taken into custody near San Diego, Calif.

Days after his mother's death, disturbing social media videos from Brown began to surface. A video appearing to be Brown was posted on an Instagram account with the username “intplayerwithapassport." (As of Wednesday, the Instagram account is no longer active.)

While Brown didn't explicitly refer to his mother’s death in the video, he said “it has to be the FBI,” PEOPLE reported previously. He then claimed that the bureau paid him an “unwarranted” visit on “Bob Marley’s death day." He also claimed the Maywood Police Department “kidnapped” him on two occasions.

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Related: Missing Ex-NFL Player Sergio Brown Appears in Bizarre Social Media Video After Mom's Homicide: 'Fake News'

In the since-deleted video, he also said he thought Myrtle was “on vacation,” and that “it had to be the FBI or Maywood PD,” without explicitly stating what “it” referred to.

Two days later, he appeared in another video on the same Instagram account, singing a Drake song and making references to dying.

It is unclear if Brown has retained an attorney to speak on his behalf.

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