n this study, the best overall presumptive tests were luminol (prepared according Weber [15]) and Bluestar® Forensic, because they degraded DNA to a lesser extent. Analysis of the Threshold Cycles (CT) done with the Internal Control PCR (IPC) in the Quantifiler®, reactions suggests that presumptive tests degrade DNA, but do not inhibit PCR, since the IPC amplified as expected, presenting a CT between 20 and 30. The IPC-CT of controls and treated samples was around 27. Consequently, depending on the amount of biological material available, degradation caused by luminol and Bluestar® is less likely to prevent the ascertainment of a complete genetic profile.