Sergio Brown Will Face 1st-Degree Murder Charge in Connection with Mother's Death: Police

Sergio Brown was arrested on Tuesday while re-entering the United States from Mexico, Maywood, Ill., police announced Wednesday

Former NFL player Sergio Brown is facing a first-degree murder charge in connection with the September death of his mother, Myrtle Brown, police confirmed in a statement obtained by PEOPLE.

Sergio's arrest, which was first reported by CNN, comes nearly four weeks after he and his 73-year-old mother were reported missing by family members on September 16, according to the press release from the Maywood Police Department. On the same day the missing persons report was made, Myrtle's body was found by a creek near the Maywood, Ill., home she shared with Sergio, but the former football player was not located.

Days after the discovery of her body, Sergio appeared in bizarre Instagram videos that were uploaded on the since-deleted account “intplayerwithapassport." In one of the videos, he said he believed Myrtle was "on vacation."

Related: Sergio Brown Arrest: What We Know After Ex-NFL Player Is Arrested in Connection with Mom's Death

According to the Wednesday press release from the Maywood Police Department, Sergio was taken into custody in San Diego on Tuesday while "re-entering" the United States after being in Mexico and "is awaiting extradition to Maywood, IL, to face charges of First-Degree Murder."

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The Cook County Medical Examiner's Office previously 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."

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

Anyone with knowledge of this incident is asked to please contact Maywood Police Investigations Sergeant Pezdek at (708) 368-4131 or the Maywood Police Department Anonymous Tip Line at (708) 450-1787.

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Read the original article on People.