Most criminological theories are tested using samples of adolescents. Consequently, there is ample evidence regarding the correlates of criminal behavior committed by teenagers. The problem, however, is that there is relatively little information regarding the correlates of criminal offending committed during late life. This limits the ability to assess the generalizability of some of the leading theories in criminology. To fill this void in the literature the present study used a sample of 2,000 elderly people (i.e., 60 years of age and older) from Arizona and Florida to examine three issues: (1) the role of general and specific routine activity measures in the explanation of criminal activity in late life, (2) the invariance of low self-control across various subgroups of the elderly sample, and (3) the generality of self-control theory and routine activity theory. The analyses revealed several important findings. First, general routine activity measures are better predictors of general criminal offending than specific indicators. However, specific routine activity measures still matter in the explanation of specific types of crimes. Another important finding of this study was that low self-control has an invariant effect on criminal offending across gender, race/ethnicity, and age. Finally, self-control theory and routine activity theory are general frameworks that explain criminal behavior committed by older people in much the same manner as among teenagers. Routine activity does not mediate the link between low self-control and offending. Rather, both low self-control and routine activity exert independent effects on late life criminal activity, net of statistical controls. The present study concludes with a discussion of the findings situated in the literature and provides policy implications that stem from the results.