A biracial man ended up dead after he tried to follow up a Facebook argument about Black Lives Matter with real-life violence

St. Louis County Police Chief Jon Belmar says that an off-duty officer shot 20-year-old Tyler Gebhard dead after he threw a 50-pound concrete planter through the officer's window and forced his way into the home after the officer's wife refused to let him in. The officer's mother-in-law and two young children were also home at the time. "I don’t think the officer had a choice — I honestly don't," Belmar said after the evening shooting, which followed online threats. Gebhard, who was biracial, knew the officer through a church connection, according to Gebhard's uncle, Patrick Brogan. Brogan says that his nephew had struggled with bipolar disorder for years and his mental health went further downhill when he was at Southeast Missouri State University in 2015. He says that Gebhard didn't always take his medication. "He had a lot of mental problems the last few months," Brogan says.