NFL players Vontae Davis (L) and Vernon Davis (R) started out as brothers growing up in D.C. They attended Dunbar High School.
The younger brother of San Francisco 49ers' tight end Vernon has been declared incompetent to stand trial in the slaying of a man visiting the nation's capital from Colorado.
Nineteen-year-old Michael Davis is charged with first-degree murder in the April death of 66-year-old Gary Dederichs.
Police say Dederichs was walking alone in a residential neighborhood when he was struck on the head with a hammer or a similar weapon.
Davis has also been charged in two nonfatal attacks and is suspected in two additional assaults.
All occurred over three days less than a mile from his home.
D.C. Superior Court Judge Robert Morin declared Davis incompetent to stand trial Friday based on a psychiatrist's recommendation.
Davis will be treated at a psychiatric hospital in hopes of restoring his competency.