From The American Conservative:

As I reported in American Conservative here and here, a Montgomery County SWAT team launched an unprovoked attack on the Lemp family home at 4:30 a.m. on March 12.  Lemp was fatally wounded by the first shots that the police fired through his bedroom window. His family says he was sleeping in bed with his pregnant girlfriend at the time.
 Police claim that they received an anonymous tip two months earlier that Lemp possessed firearms. The police department asserted  Lemp was prohibited from owning firearms due to a juvenile conviction but there are apparently zero court records or other records to support that justification.  Regardless of Lemp’s juvenile history, there was no evidence that he posed an imminent threat justifying a frontal assault that included throwing flash-bang explosive devices into the family home.