A former NFL player is missing after his mother was found dead in a creek behind her home in Illinois. Mystery erupted around Sergio Brown on Saturday after a concerned family member filed a missing persons report for the 35-year-old New England Patriots alum and his mother Myrtle Brown, 73. Myrtle was found dead less than 100 yards from her Maywood home the following day. Her death was ruled a homicide as the Cook County Medical Examiner’s Office found injuries resulting from an assault. The case took a bizarre turn as videos emerged from an Instagram account linked to Mr Brown. In one video, a man identified as Mr Brown claims he’s been kidnapped by law enforcement as he goes on a long-winded rant against “fake news” and the FBI. He also claims that he thought his mother was on vacation. The Independent has not been able to independently verify the account. Maywood police told NBC that the department is aware of the social media account. “Currently this is an active investigation, and the department is unable to share any further details at this time. We appreciate your patience while our agency continues to investigate the matter,” police said. Read More Missing ex-NFL star posts bizarre Instagram about police and FBI after mother found dead in creek Ex-NFL star Sergio Brown and his mother went missing. Police say she was murdered and he has yet to be found