Published: Oct 18, 2010 3:41 PM EDT
Updated: Oct 18, 2010 12:41 PM EDT

SATELLITE BEACH, Fla. (AP) - The Coast Guard has suspended its search of the waters off Florida's Space Coast for a 49-year-old dentist who hasn't been seen since leaving on a fishing trip.

Michael Alexander's empty kayak was found Thursday about 20 miles northeast of Satellite Beach. It was brought to shore by crime scene investigators for processing. Investigators also found his blue pickup truck at a Satellite Beach park.

State and federal rescuers had been searching for Alexander by sea and land, but the Coast Guard called off its search Saturday evening.

Authorities say the Cape Canaveral man left a note for his girlfriend on Wednesday morning saying he was going fishing.