The head of the county’s homeless agency is calling on law enforcement to investigate the attacks as a hate crime.

MIAMI - An arrest has been made in the unprovoked attacks on the homeless in Downtown Miami that left two dead. Brenton Clarke, 36, has been charged with two counts of first-degree murder, two counts of attempted first-degree murder and armed robbery with a deadly weapon.

The police said that Brenton Clarke, 36, of Long Island, N.Y., used a metal rod and a wooden stick to attack four homeless people in what they said was an unprovoked assault.