An attorney representing the driver of the boat that collided Sunday with a ferry off Clearwater, Florida, killing one person and injuring 10 others, disputes that he fled the scene, as the victim’s family demands answers about an investigation that has so far led to no arrests.

Horrific screaming' was heard in the background of 911 calls after a speedboat struck a Clearwater Ferry on April 27, leaving one dead and others injured, authorities have said. The U.S. Coast Guard also released a "mayday" call that they received.