Final answer:
A forensic scientist named Jamaad ran a presumptive test to narrow down the possibilities of what drug a substance could be, which is not a definitive identification but rather a preliminary screening.
Step-by-step explanation:
Jamaad, working as a forensic scientist, likely conducted a presumptive test on the substance in question. Presumptive tests are designed to reduce the number of possible substances that may be present by producing a reaction indicative of a certain class of drugs. These tests are not confirmatory, meaning that while they suggest the possible presence of a drug, they do not definitively identify it. For example, the color change in a Marquis test can indicate the presence of amphetamines or opiates, but further confirmatory tests are needed to pinpoint the exact substance.