Sergio Brown, a former NFL player is missing after his mother was found dead near a creek behind her home. The Cook County Medical Examiner’s Office ruled her death a homicide on Sunday.

Relatives of 73-year-old Myrtle Brown told Illinois authorities they couldn’t reach either her or her 35-year-old son on Saturday. A search was launched for the pair and Myrtle’s body was discovered by the authorities. It was found that she reportedly died from multiple injuries tied to an assault.

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Sheila Simmons, the victim’s sister, told WGN-TV that she last spoke to her sister on Thursday. “We’re going to find out what happened because it’s not normal for my sister to not answer her phone, not to respond to text messages. People have been reaching out to her since Friday. No one was able to reach her,” Simmons told the station. “Now, I got the call this morning saying that she’s missing, so immediately I came out here and find out my sister is dead.”

Who is Sergio Brown?

Sergio Brown is a former safety who played for the New England Patriots, Indianapolis Colts, Jacksonville Jaguars, and Buffalo Bills. He appeared in a total of 94 games.

He played in the league from 2010 until 2016. Prior to going pro, he played his high school ball at Proviso East High School in Maywood, Chicago. He is a Notre Dame alum.

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Nick Brown, Sergio’s brother, has urged him to come home in a Facebook post, the Chicago Tribune reported. “I want him to know that I love you and please come home,” Nick wrote.