On July 7, 2010 the captain of a tourist duck boat carrying 37 passengers in the Delaware River off Philadelphia shut off his engine to investigate whether the engine was on fire. The tug M/V Caribbean Sea was towing the 250-foot barge The Resource nearby.

According to federal prosecutors, the pilot of the tug, Matthew Devlin, was distracted by cellphone messages and laptop use, and did not see that the barge was about to strike the duck boat.

The barge collided with the duck boat. Two Hungarian tourists, Szabolcs Prem, 20, and Dora Schwendtner, 16, were killed. The duck boat sank to the bottom of the Delaware River.

Three dozen passengers were pulled from the Delaware alive. Most had jumped from the duck boat before the collision. Eleven were injured.

In a photo taken just before the accident, according to federal prosecutors, the upper wheelhouse is seen empty. Prosecutors say pilot Matthew Devlin should have been in the upper wheelhouse, where he would have had better visibility.

Some of the duck boat's passengers were able to grab life jackets before the collision.

Survivors of the collision seen on shore after the July 10, 2011 collision. Tug pilot Matthew Devlin faces a federal manslaughter charge and has been offered a plea deal in which he would surrender his mate's license and likely serve three to four years in prison.