The use of light being held at oblique angles towards a document is one of the simpler methods of examining indented writing. In Vickers’ case it was an effective method of identifying what she wrote. In forensic cases, examiners may want to look for indentation caused from pages several sheets above the original document, which calls for a much more sensitive device. An electrostatic detection device (EDD) is a piece of equipment that is used to find impressions left on a questioned document. The device is about the size of a standard home printer and its basic components include a grounded plate and thin piece of film. After a questioned document is placed in between the plate and the film, an electrostatic charge is passed through the paper. Special toner is added to the device and is attracted areas of indentation, which have a higher charge.

While Vicker’s case called for a simple method of identifying indented writing and did not require specialized equipment, EDD has been helpful in visualizing writing in pages that are several sheets above the original document. This type of sensitivity may be very helpful in determining who wrote a document or where it may have came from, such as kidnapping cases that involve ransom notes.

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Now a public figure, Dillinger turned to plastic surgery to alter his identity and evade Purvis and the rest of the law enforcement community. In those days, plastic surgery was not as common as it is today, and the medical procedures were primitive, dangerous, time-consuming and very painful. Dillinger underwent several bouts of plastic surgery, some more successful than others, but in the end he only managed to slightly alter his appearance. After one round of plastic surgery from which he was extremely disappointed to find that he still looked the same, one of the doctors suggested that he remove his fingerprints as a way to escape being detected. Dillinger liked this idea and elected to undergo the painful process of obliterating his fingerprints.

A wanted poster for Dillinger, complete with all ten fingerprints

Dillinger was not the first criminal to come up with that idea. In 1933, “Handsome Jack” Klutas had attempted to file down the small ridges on his fingers, but he ultimately failed. Two of Kate “Ma” Barker’s clan, Alvin “Creepy” Karpis and Ma’s son Freddy, decided to remove their fingerprints as well, so they hired mob physician Joseph P. Moran to do the job. Moran was inexperienced in this procedure and repeatedly hacked and knifed at their prints until the gangsters couldn’t bear any more pain, but when their fingers finally healed, the fingerprint ridges grew back to their original patterns.

Hoover was aware of this trend among criminals and he became wary of the possibility of success. He commissioned several surgeons and dermatologists to report on the likelihood of someone obliterating their fingerprints, and in 1934 they came back with their findings. Dr. Howard L. Updegraff, a member of that committee, had extensive experience in the area of fingerprint alterations and he reported that the only way to permanently obliterate a fingerprint is to graft skin from another part of the body over them. And in 1941, that’s exactly what Robert Phillips did when he got a doctor to graft the skin from his chest on to the tips of his fingers. Phillips, however, was caught because the ridges surrounding the graft areas, as well as on the other joints of his fingers were used to identify him.

Dillinger seemed to have taken the road less traveled when he chose acid to burn the tips of his fingers with in late May, 1934. The procedure appeared to be successful; however, faint ridge markings were still visible on his fingertips after the full healing process, as were seen after Dillinger’s death.

Many people in American history have attempted to elude the authorities by scarring or ruining their fingerprints, but forensics has been able to keep up with those criminals all the while. In fact, as Phillips found out firsthand, just ruining the tips of one’s fingers does not preclude fingerprint identification. The ridges that are found on the tips of one’s fingers are also found on the entire surface of the palm, and they are just as unique to an individual. Furthermore, by introducing scars onto one’s fingers, it makes the identification process even easier, since the scar patterns are unique and less common to the general population.

If one thing can be learned from Dillinger and the other notorious outlaws of the Gangster Era it’s that crime does not pay, and eventually criminals will be brought to justice, and not always the pretty way.

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