Navarre Beach, Fla. ? A Kansas man was pronounced dead Sunday after his wife found him lifeless in the water and pulled him to shore, authorities said.

William James True, 51, from Kansas City, Kan., was pronounced dead after about 40 minutes of CPR and other attempts to revive him, the Santa Rosa County Sheriff’s Office said.

An autopsy is set for today to determine the exact cause of death.

The sheriff’s office is investigating the case.

True and his wife were celebrating their 25th wedding anniversary, authorities said.