Enhancement of latent fingermarks found at crime scenes can be crucial to criminal investigations. This study looks at the effectiveness of ninhydrin analogues 1,2-indanedione (IND/Zn) and 1,8-diazafluoren-9-one (DFO) for such operational use. Using fingermarks deposits from seven donors, tests were done on seven substrates commonly encountered in local crimes - plain A4 paper, glossy magazine, paper magazine, brown envelopes, white envelopes, cardboard, and joss paper. Findings show that show that IND/Zn consistently produced fingermarks of superior quality and contrast to DFO across the different donors, substrates and time periods. IND/Zn also appears to be more sensitive compared to DFO.
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View: Evaluation of the performance of IND/Zn and DFO on various porous substrates in Singapore context
