John Brennan asked a judge to order the administration to preserve records related to the investigations.
Three other members of the MH-60S Sea Hawk flight crew have been safely recovered.
‘This is the biggest corporate investment of its kind,’ President Donald Trump said on Truth Social.

A couple who starred in a Netflix documentary about climbing skyscrapers were arrested after climbing the Empire State Building.
The $400 million plane was a gift from the Qatari government last year, and required upgrades to meet security standards, Trump said.
Six of the 10 cities are in central California, while the other four cities are in Texas.
The mandate went into effect July 1 despite lawsuits and opposition from state workers.
The decision provides relief for family and friends of Trump Account beneficiaries who wish to contribute to these accounts.
The law appears to violate the U.S. Constitution, the judge said.
The Trump administration has moved to counter blackout threats blamed on prior policies as record heat strains PJM Interconnection region.
Anthropic said it will start restoring access to both models on July 1.
The court handed down consequential rulings on Trump’s executive powers, the Second Amendment, election cases, and boys in girls’ sports.
The bill, introduced by Rep. Brett Guthrie (R-Ky.), passed in a 267–117 vote with support from both Democrats and Republicans.
The court said Idaho, West Virginia laws do not violate the Constitution or Title IX by keeping boys out of girls sports.
The high court is expected to issue its highly anticipated ruling on Trump’s order restricting birthright citizenship.
The judge said the DOJ failed to explain the basis of its request to access the state’s voter registration data.
The court’s rulings have long-term effects on independent agencies and the Federal Reserve.
A majority of the court said that Trump failed to provide notice and an opportunity for Cook to respond to her termination.