WASHINGTON (AP) — The few public signs emanating from special counsel Robert Mueller's investigation increasingly raise the prospect that former national security adviser Michael Flynn is looking to cut a deal.

But many questions remain about what charges, if any, Flynn would face and whether Mueller's prosecutors are focused on his private business dealings and truthfulness with federal agents, or if they're looking for a bigger fish like the president himself or those who remain in his inner circle.

A plea would certainly be a Washington bombshell, putting a retired U.S. Army lieutenant gene...