George Birdwell’s first recorded robbery was on March 9, 1931, when he and Floyd joined William “Billy the Killer” Miller in robbing a bank in Earlsboro, Oklahoma, for $3,000. Five months later, they raided another bank in nearby Shamrock but managed to get only $400. They fared better several days later when they raided a bank in Morris, Oklahoma for $1,743 on September 8 and scored another $3,850 from a bank in Maud three weeks later. On October 19, he and Floyd returned to Earlsboro and robbed the same bank they had originally raided with Miller seven months before, this time getting $2,498. They continued on their crime spree stealing $2,500 in Conowa on November 5, 1931 and another $2,500 in Castle, Oklahoma, on January 14, 1932. He was also believed to have been the unidentified accomplice who helped Floyd robbed $800 from a bank in Dover a week later. By early-1932, bankers across the state were petitioning the governor to take action against Birdwell and Floyd. After Floyd began renting a home in Tulsa for his wife and child, a confrontation between police became even more likely. Soon afterwards, on February 7, police saw the two fugitives driving through the city and attempted to pursue but lost them after a wild gunfight which resulted in the shooting of a police officer. Three days later, they were again confronted by the authorities when police surrounded Floyd’s home and attempted to force the outlaws out. Birdwell and Floyd managed to sneak out the back way as police fired tear gas into the house.

George Birdwell and Floyd showed no signs of ceasing their activities despite their narrow escape as, six weeks after their escape from Tulsa, they robbed yet another bank in Meeker, Oklahoma, for $500 on March 23. When Birdwell’s father died a month later, local sheriff’s deputies staked out the funeral home in Earlsboro hoping to capture Birdwell if he showed up. The bandits did indeed arrive at the funeral home but unexpectedly turned the tables on the lawmen when Floyd held them at gunpoint while Birdwell was able to pay his last respects. The next day, on April 21, they took $600 from the cash drawers of a bank in Stonewall, Oklahoma. While driving near Ada on June 7, Birdwell and Floyd were ambushed in a police trap but managed to getaway. Police sharpshooters later claimed that both men had most likely worn full body armor in order to have survived the gunfight. Five months later, he and Floyd committed one of their biggest bank jobs when they and Aussie Elliott stole $2,530 from a bank in Sallisaw, Oklahoma on November 1. They were, however, wrongly accused by authorities of robbing a bank in Henryetta of $11,252 six days later.

Shortly afterwards, perhaps encouraged by the Henryetta robbery, George Birdwell came up with a plan to rob the Farmers and Merchants Bank in Boley, Oklahoma. Floyd disagreed with the proposal pointing out that they would likely stand out in the heavily Black town and that local residents would most likely rush to the aid of the bank in the event of a robbery. Birdwell decided to go ahead with the robbery and recruited Charles Glass and C.C. Patterson. Birdwell failed to note that the day of the planned robbery, November 23, fell on the first day of bird-hunting season and residents were stocking up on shotguns and ammunition. The robbery proceeded as planned as Birdwell and his accomplices managed to gain entry into the bank. Birdwell, armed with a .45 automatic pistol, held everyone in the bank while Glass and Peterson looted the desk drawers. In one of the tellers’ cages however, an automatic alarm was triggered when the last bills were taken. The alarm alerted bookmaker H.C. McCormick, who had been overlooked while at work in the back room, and confronted the men with a rifle shooting Birdwell through the heart. Mortally wounded, Birdwell managed to kill bank president D.J. Turner before collapsing. Glass and Paterson attempted to flee, however by this time local residents had been alerted by the gunfire and were waiting for them as they exited the bank. Opening fire, Glass was killed instantly and Paterson seriously wounded. He was saved by the town sheriff who intervened before the mob could fire a second volley. Patterson eventually recovered from his wounds and later sentenced to the state prison in McAlester. George Birdwell was found alive in the bank and was taken to a nearby hospital in Henryetta but died shortly after his arrival. McCormick was later awarded $1,000 for his actions and made an honorary major in the state militia.