1. Study on perpetrators of mass killings Not later than 180 days after the date of the enactment of this Act, the Secretary of Homeland Security shall conduct a study, and submit to Congress a report on perpetrators of mass killings (as such term is defined under section 875(d)(2)(A) of the Homeland Security Act of 2002 ( 6 U.S.C. 455(d)(2)(A) )), which shall include, for all mass killings perpetrated beginning on January 1, 1900, the following: (1) An itemization of all mass killings. (2) The number of perpetrators of mass killings who were under the influence of a drug or alcohol at the time of the killing, specifying alcohol or the specific drug, as applicable. (3) Any history of substance use of the perpetrator, including alcohol and drugs (including any prescription medication or therapy), details of the specific type of substance, along with descriptions of the nature of the use, duration, and any resulting side effects, issues, or changes in the perpetrator resulting from such use. (4) Specific information regarding parental figures, and other family, friends, and close associates who may have strongly influenced the perpetrator. (5) Whether and to what extent each perpetrator may have engaged with violent video games or other violent media. (6) Details regarding sexual history, including sex and sexual orientation, exposure to or use of pornography, and sexual abuse or other sexual violence committed by the perpetrator or with respect to which the perpetrator was a victim. (7) Details regarding any pattern of hatred of the perpetrator focused on immutable or mutable characteristics of others, including race, ethnicity, sex, national origin, religion, or sexual orientation. (8) Any other commonalities among the perpetrators of mass killings, as determined by the Secretary. (9) Details regarding the perpetrator’s religious training history, activity, and affiliation. (10) The itemized number of mass killings that were perpetrated with a firearm (as such term is defined in section 921 of title 18, United