Fred Burke

And along the way, they recover some physical evidence, fingerprints that they're able to compare.

And they learn at that point that Fred Dane is actually a man named Fred Killer Burke.

Burke was actually kind of a sole entrepreneur working on his own, sometimes for the mob, sometimes for himself.

But he had a beef with Bugs Moran because it was Moran's men who actually hijacked some of his illegal shipments of alcohol, costing him a lot of money.

Inside of a barrel of a gun are these things called lands and grooves that create kind of a circular motion.

Calvin Goddard wondered if he could scientifically examine bullets and see if they came from the same gun, thinking that those lands and grooves might actually be like a fingerprint, so to speak, that it would be very characteristic of just that weapon.

Calvin Goddard examines the guns found at Fred Killer Burke's house, along with bullets recovered from the Valentine's Day massacre.

Goddard does his testing, and he reaches a stunning conclusion.

Dane.So using these documents, they go to the home of Fred Dane and they find something that they've never seen before, certainly not in the small town of St. Joseph.

They discover a cache of automatic weapons, two Thompson submachine guns, grenades, shotguns, and along the way, they recover some physical evidence, fingerprints, that they're able to compare, and they learn at that point that Fred Dane is actually a man named Fred "Killer" Burke.

Burke was actually kind of a sole entrepreneur working on his own, sometimes for the mob, sometimes for himself.

But he had a beef with Bugs Moran because it was Moran's men who actually hijacked some of his, uh, illegal shipments of alcohol, costing him a lot of money.

Inside of a barrel of a gun are these things called lands and grooves that create kind of a circular motion.

Calvin Goddard wondered if he could scientifically examine bullets and see if they came from the same gun, thinking that those lands and grooves might actually be like a fingerprint, so to speak, that it would be very characteristic of just that weapon.

Calvin Goddard examines the guns found at Fred "Killer" Burke's house, along with bullets recovered from the Valentine's Day Massacre.

Goddard does his testing, and he reaches a stunning conclusion.

Whatever they uncovered, it was enough to spur Assistant State's Attorney Walker Butler and Lt. William Cusack to travel to St. Louis to meet with the chief of police there.

When he heard that the killers wore police uniforms, the chief suggested two likely suspects, Fred Burke and James Ray, presumed to be an alias of Gus Winkler.

Both men had served time in prison and were wanted for murder.

Burke was wanted for a long series of robberies and murders all over the Midwest and had been a fugitive since about 1925.

Numerous witnesses on St. Valentine's Day, including the chauffeur of the president of the Chicago Board of Education, noted one very recognizable physical characteristic of one of the men they saw that morning.

The witnesses to the slaying stressed the fact that one of the killers in police uniform had two front teeth missing, said Assistant State's Attorney Butler.

Fred Burke was missing two teeth.

Butler and Cusack returned to Chicago confident enough in what they had learned to publicly name Burke and Ray as two of the killers.