A study on the effectiveness of cyanoacrylate fuming after powder treatment in fingerprint identification

초록

Methods of developing a latent fingerprint deposited on non-porous surface include fingerprint powder, which physically develops a latent fingerprint, and cyanoacrylate (CA) fuming method, which chemically develops a latent fingerprint. Therefore, as chemically processible amino acids or proteins will be remained in fingerprint once processed with powder method, further enhancing effect is predicted to be obtained with additional CA fuming process. To confirm this, we compared latent fingerprints only processed with black powder and latent fingerprints processed again with CA fuming after processed with powder method. As a result, it was confirmed that quality of the fingerprint was improved in eccrine gland and natural fingerprint except sebaceous gland fingerprint, and this phenomenon was also observed even when the powder applied or surface, latent fingerprint deposited on, was changed. Also fluorescence was successfully obtained in the fingerprints processed with fluorescence dye like basic yellow 40 or rhodamine 6G after sequentially processed with powder method and CA fuming method.

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