This article summarizes results from a survey on social-contextual risk factors and drinking and polydrug use among 317 undergraduate college students. Retrospective alcohol use was a primary predictor for prospective heavy alcohol use and drinking game participation was a primary predictor for prospective alcohol occurrences, while social-contextual factors were primary predictors for prospective drug use. Primary and secondary predictors differed for prospective alcohol severity, alcohol frequency and drug use, suggesting that there are specific risk factors associated with each type of drinking and drug-using pattern. There were also significant differences in monthly over-the-counter medication, prescription medication and drug use among students who participated in drinking games, collegiate sports, and Greek organizations. These results suggest that students who have experimented with alcohol and drug use prior to entering college may be more likely to engage in social and recreational activities where alcohol and drugs are available; therefore college prevention programs should focus on increasing alternative activities to deter alcohol and drug use.

Ignitable liquids are present in trace amounts in samples collected from arson scenes therefore their chemical composition often differs from their original composition. This is due to partial evaporation, burning and contamination by pyrolysis products at the scenes.

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