AUSTIN, Texas -- Police on Thursday identified a man who was found bound with duct tape in Lady Bird Lake in East Austin.

Parkgoers discovered the body of Riad Hamad, 55, Wednesday afternoon just east of the Interstate 35 bridge near Festival Beach. Hamad was a computer teacher at Small Middle School and had been planning a trip to Palestine to teach children there.

Witnesses who found Hamad said the man had duct tape on his face, and his hands were tied. Police have called the death suspicious. Investigators on Thursday said family and other sources have told them that Hamad was suicidal.