This document discusses how age, gender, social class, and race/ethnicity relate to crime. It notes that crime increases in early adolescence, peaks in young adulthood, and declines with age. Lower socioeconomic backgrounds are more likely to be arrested for violent and property crimes. Aboriginal people are overrepresented in prison populations in Canada, making up 25% of inmates but only 4% of the general population. Explanations for overrepresentation include immigration, discrimination, and a focus on crimes committed by low-income groups.