The man found dead in the wateroff of Pinole Point Regional Shoreline Sunday morning has been identified as a tug boat operater who went missing near Mare Island earlier this month.

The Contra Costa County coroner's office confirmed Monday that 77-year-old Philip "Steven" Mattingly was the man found in the water near the northwest corner of the park  around 11:20 a.m. Sunday.

Authorities had been searching for the Fair Oaks man since he was reported missing by his son on Dec. 9. He was last seen the evening before, when he was working on his tugboat named the "Eugene E" at Berth .10 on the east shore of Mare Island, Vallejo police Lt. Lee Horton said. His truck was parked at the scene and his personal items on the boat were still intact when the search began, according to authorities.

For the next two days, divers from the Solano County Office of Emergency Services searched the Mare Island Strait, while the U.S. Coast Guard and emergency workers from Vallejo and Solano County assisted with searching along the coast line.

Police did not suspect foul play when Mattingly went missing as he had health issues that necessitated medication.

The cause of death was still under investigation Monday afternoon.

Anyone with information was encouraged to call investigators at (510) 881-1833.