The report released on Tuesday and prepared by the National Threat Assessment Center (NTAC) highlights behavioral threat assessment themes identified in years of research examining targeted violence.

Themes include concerning and threatening communications, concerning online content, chronic and acute stressors, elicited concern in others, interpersonal difficulties, history of being bullied, financial instability, failed life aspirations and lack of consequences.

As a case study, the Secret Service examined a 2018 shooting at a yoga class in Tallahassee, Florida, in which a man killed two women and wounded six.

“The attacker was motivated to carry out violence by his inability to develop or maintain relationships with women, along with his perception of women’s societal power over men,” the report said.