( CNN ) -- Marine Lt . James Patrick Spears , 25 , went missing on Wednesday . ` ` So there 's no question '' Spears 's death related to ISIS operations , Kirby says . Spears has been declared dead by the government after rescue efforts failed . His death has not yet been confirmed , Kirby says .
Marine Lt . James Patrick Spears , 25 , went missing on Wednesday . ` ` So there 's no question '' Spears 's death related to ISIS operations , Kirby says . Spears has been declared dead by the government after rescue efforts failed . His death has not yet been confirmed , Kirby says .