The neighbor of Botham Jean, the 26-year-old man who was killed by a Dallas police officer in his own apartment, was shot to death, according to local reports.

Joshua Brown, who was also a key witness in former officer Amber Guyger’s trial, was gunned down at the South Side Flats apartment complex in Dallas on Friday night, the Dallas Morning News reported.

Brown, 28, died three days after Guyger was sentenced to 10 years in prison for fatally shooting Jean after she claims she mistakenly entered his apartment, which was one floor above hers.

Lee Merrit, the attorney for Jean’s family, also reported Brown’s death on social media, noting that he spoke with Brown’s mom and a medical examiner.

“His murder underscores the reality of the black experience in America,” Merrit said in a Facebook post. “Brown lived in constant fear that he could be the next victim of gun violence, either state sanctioned or otherwise.”

In a separate post, Merrit said that Brown’s mother “suspects foul play,” adding, “it is difficult to rule it out.”

“He had no known enemies. He worked for a living. He was not in the streets,” he wrote on Facebook. “We need answers. Immediately.”

Merrit didn’t immediately respond to HuffPost’s request for comment.