This document presents data in several areas: body-related issues that may have been challenges to the perpetrators’ identities, family members who served in the military and/or law enforcement, the shooters’ aspirations to serve in these professions, and the frequent thwarting of these aspirations. These different sets of data are presented together to explore possible connections between the shooters’ family role models for masculinity, their own possible sense of damaged manhood, and their own striving to be soldiers or police officers. Note: though the focus is on masculine identity, the document also includes female shooters with body-related issues, family members in the military, and military aspirations.