Did missing former Patriots player Sergio Brown post videos about his mother’s death? The police are investigating.

MAYWOOD, Ill. (AP) — Police in suburban Chicago are verifying the authenticity of Instagram videos that appear to show missing former NFL player Sergio Brown discussing the recent death of his mother, who died following ‘an agression.

Brown, 35, is still considered a missing person, Maywood police spokeswoman Carmen Rivera said in an email Tuesday, acknowledging that police were aware of the videos and were investigating. Rivera did not immediately return messages Wednesday seeking an update.

In a video posted Monday to an Instagram page that appears to belong to Sergio Brown, a man resembling Brown calls reports of the death of his 73-year-old mother, Myrtle Brown, “fake news.”

“Fake news, fake news, fake news. It must be the FBI,” the man says in the rambling, expletive-filled video, in which he says he thought his mother “was on vacation” in the Mexican state of Sinaloa.

In another video posted to his Instagram Story on Tuesday, the man references the movie “Finding Nemo,” repeating the movie’s famous line, “Just keep swimming, keep swimming,” the Chicago Tribune reported.

Myrtle Brown’s body was found Saturday near a creek behind her home in Maywood, about 12 miles west of Chicago. Relatives had told police they could not locate her or Sergio Brown.

The Cook County Medical Examiner’s Office on Sunday ruled Myrtle Brown’s death a homicide, saying she was injured during an assault.

Police said Sunday they were trying to find Sergio Brown and asked anyone with information on his whereabouts to contact them.

Brown’s brother, Nick Brown, paid tribute to their mother on social media Sunday, calling her “strong, caring, diligent, whimsical, funny.” He asked anyone who knows his brother’s whereabouts to share that information with police.

“I want him to know I love you and come home,” Nick Brown wrote.

Sergio Brown, a graduate of Proviso East High School in Maywood, played college football for Notre Dame before joining the NFL. He played as a defensive back from 2010 to 2016 with the New England Patriots, Indianapolis Colts, Jacksonville Jaguars and Buffalo Bills.