Michael Davis, 19, is charged with first-degree murder in last month's death of a 66-year-old tourist visiting from Denver.
A D.C. man charged with killing one man and assaulting two other people in separate attacks in the District's Petworth neighborhood has been deemed incompetent to stand trial.
Michael Davis, 19, is being sent to St Elizabeth's for further evaluation. Davis will be brought back to court in 60 days to determine if his condition improves with treatment.
Davis is charged with first-degree murder in last month's death of Gary Dederichs, 66, who was visiting from Denver.
He has also been charged in two nonfatal attacks, and is suspected in two additional assaults. All occurred over a 3-day period in northwest, D.C.
Davis is the brother of NFL players Vernon and Vontae Davis.