CHICAGO — Maywood (Ill.) police detectives are aware of and looking into videos apparently showing missing former NFL player Sergio Brown discussing the death of his mother.

In a video posted Monday to an Instagram page appearing to belong to Brown, he called reports about his mother’s death “fake news.”

“Fake news, fake news, fake news. It has to be the FBI,” he said in the rambling post.

The expletive-filled video directed toward ESPN and apparently filmed under a bar hut went on to describe interactions he had with the Maywood police in which he says he was “kidnapped.”

“I thought my f------ mama was on vacation in Sinaloa,” he said.

In another video posted to his Instagram story Tuesday, Brown, 35, referenced the film “Finding Nemo,” repeating the movie’s famous line, “just keep swimming, just keep swimming.”

“Missing? They ain’t never seen Finding Nemo?” he said. “This is traumatic. Lucky I know how to say a joke.”

Police said Tuesday they were aware of the posts and are “looking into its authenticity.” The former safety who played college football for Notre Dame and played professionally most recently for the Buffalo Bills is still considered a missing person, Maywood Police Department spokesperson Carmen Rivera said.

“Currently this is an active investigation, and the department is unable to share any further details at this time,” Rivera wrote.

Family members reported Brown and his mother, Myrtle Brown, 73, missing Saturday. Later that day, police discovered Myrtle Brown’s body in a creek behind her home.

The Cook County medical examiner’s office ruled her death a homicide Sunday, saying she suffered multiple injuries during an assault. Police said Sunday they were attempting to locate Sergio Brown and asked anyone with information about his whereabouts to contact them.

Brown’s brother, Nick Brown, memorialized his mother on social media Sunday, calling her “strong, caring, diligent, fancy, funny.” He asked anyone who knows where his brother is to share information with police.

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