The research consisted of two experiments. The first was designed to establish whether the latent fingerprint fluorescence observed after electrical discharge treatment was an increase in natural fluorescent yield or an induction of another component of fingerprint residue to fluoresce. This was achieved by separating the fingerprint residue by thin-layer chromatography (TLC) and then discharging the separated components. The second experiment was designed to ensure that the induction of fluorescence within the fingerprint residue was not dependent on initially separating the residue by TLC. An increase in latent fingerprint fluorescence was observed after electrical discharge treatment. The TLC experiments found the fingerprint residue from all donors separated into three main fluorescent bands: an orange band (Band 1), a green band (Band 2), and a green/yellow band (Band 3) in order of decreasing Rf. On close inspection, Band 1 was found to occasionally split into two bands: a yellow band (Band 1b) and an orange band positioned directly below (Band 1a). This pattern of separation is consistent with results reported by Jones et al. Fluorescent material was observed in the sample fingerprint after plate development, indicating that not all the fluorescent material was separated from the fingerprint by the TLC method. No quantitative data on fluorescent intensities were collected during the study. The fluorescence observed was from previously nonfluorescent fractions of the fingerprint residue, and TLC results suggest lipid derivatives as a possible source of the fluorescence. 9 figures and 16 references