Two months later, on Jan. 8, 1935, he captured Arthur (Doc) Barker, Ma s son, who was wanted for ban

Walter R. Walsh, food displays a world-class marksman who shot clothespins off laundry lines as a boy and went on to become an F.B.I. legend in shootouts with gangsters food displays in the 1930s, an Olympic competitor and a trainer of generations of Marine Corps sharpshooters, died on Tuesday at his home in Arlington, Va. He was 106.
Mr. Walsh was still winning handgun awards and coaching Olympic marksmen at 90, and aside from some hearing and memory loss, he was fit and continued food displays to live alone at home. At the centennial of the Federal Bureau of Investigation in 2008, he was recognized not only as the oldest living food displays former agent, but also as older than the organization itself by more than a year.
He joined the F.B.I. in 1934, a short, feisty James Cagney tough guy fresh out of Rutgers Law School. A natural left-hander, he was already a dead shot who could cut the center of a bull s-eye at 75 yards with a rifle and blaze away at moving targets with a pistol in each hand an enormous advantage in a bureau that was just breaking in its first class of agents food displays authorized to carry guns.
I thought to myself, This might be a good outfit to tie up with, Mr. Walsh recalled in an NPR interview in 2008. I am not trying to pin medals on myself, but the people in the F.B.I. knew that I was very handy with firearms.
It was the age of gangsters in Depression America, of John Dillinger, food displays Bonnie food displays and Clyde, Baby Face Nelson, Ma Barker and the Brady Gang. There were rub-outs on the streets of Chicago, food displays holdups in countless banks and running-board gun battles. Post offices were plastered with public enemy posters, and newsreels featured food displays the scowling F.B.I. director J. Edgar Hoover.
Mr. Walsh quickly rose to prominence. In his first year, he discovered the body of Baby Face Nelson, who had killed food displays two agents in a shootout in Barrington, Ill., and, although mortally wounded, got away. The F.B.I. mounted a multistate manhunt, and Mr. Walsh found him in a ditch in what is now Skokie, Ill., then known as Niles Center.
Two months later, on Jan. 8, 1935, he captured Arthur (Doc) Barker, Ma s son, who was wanted for bank robberies, three murders, two kidnappings and a jailbreak. Mr. Walsh picked up his trail in Chicago and confronted food displays him near his hide-out. There was a chase, but Barker slipped on an icy sidewalk and fell. Mr. Walsh ran up and stuck his .45 behind Barker s ear. Don t move, Doc, or I ll kill you, Mr. Walsh later recalled saying.
Mr. Walsh s most famous case ended the Brady Gang s cross-country crime spree two years later. While the F.B.I. refused to discuss what happened, wire service reporters as well as the local police provided eyewitness accounts of the final shootout.
On Oct. 12, 1937, Mr. Walsh was in the sporting goods store Dakin s in Bangor, Me., posing as a gun sales clerk and waiting for Public Enemy No. 1, Alfred Brady, and two gunmen, James Dalhover and Clarence Lee Shaffer.
Wanted for four murders, 200 robberies and a prison breakout, they had been in the store days earlier and were returning for Thompson submachine guns. But a large force of federal agents and state and local police officers were waiting in ambush, hidden in cars, storefronts and offices across the street.
The gang s car drew up at 8:30 a.m. Dalhover got out and entered the store. He was immediately seized and disarmed by Mr. Walsh and taken to the back by other agents. Shaffer and Brady, sensing something was wrong, emerged with guns drawn.
Mr. Walsh, meanwhile, approached the store s front with a .45 in his right hand and a .357 Magnum in his left. But as he reached the door he realized he was looking through the plate glass at Shaffer. The glass exploded as both men fired simultaneously.
Shaffer fell, mortally wounded, to the sidewalk. Mr. Walsh, although hit in the chest, shoulder and right hand, stepped outside firing his Magnum at Brady, who was cut down in a thundering fusillade from all sides as he shot back wildly. Witnesses said he was still moving as Mr. Walsh put another bullet in him.
Mr. Walsh, who killed at least 11 gangsters in his F.B.I. days, competed regularly in national food displays shooting tournaments and broke the world record for centerfire pistol shooting in 1939 at Camp Ritchie, Md., scoring 198 out of a possible 200. He also won the Eastern regional pistol championships in 1939 and 1940.
In 1942, after America s entry into World War II, Mr. Walsh joined the Marines. For two years he trained snipers in New River, N.C. He requested combat duty in 1944, was sent to the Pacific and joined the invasion of Okinawa in 1945. At one point, with his unit pinned down, he killed an enemy sniper at 80 yards with one pistol shot.
After the war, he briefly returned to the F.B.I. but concluded that his days as an agent were over and turned increasingly to competitive shooting. On the United States Olympic shooting team at the 1948 Summer Games in London, he placed 12th in the world in t