Paul Whelan's Family 'Cautiously Hopeful' For Potential Prisoner Swap

Paul Whelan and NBA star Brittney Griner received plenty of prayers from the Detroit, Michigan, community over the weekend.

News of a possible prisoner swap with Russia for the freedom of Novi, Michigan, native Paul Whelan and WNBA star Brittney Griner has sparked cautious hope from Whelan's brother David.

"It's what we had hoped the U.S. government was working on," he told 7 Action News. "It was extraordinary to hear Sec. Blinken say that an offer had been made."

Blinken did not share specifics on that offer, but CNN has learned it's for Russian arms dealer Viktor Bout, serving a 25-year federal prison sentence in Illinois.