From what I have learned from knowledgeable guys like Rusty Moore and Mark Sisson that doesn't seem to be the case.

据我从知识人士像鲁斯迪摩尔和马克西森所那里了解到，事实好像并不是这样的。

youdao

Police Chief Mark Sisson said Friday that authorities were investigating online postings reportedly made by Neil MacInnis before the shooting but that he was unable to confirm whether those postings were legitimate.

NPR: Uncle: Family Of Suspect In Va. Shootings Stunned

Neil Allan MacInnis, of Christiansburg, faces two counts each of malicious wounding and using a firearm in the commission of a felony stemming from the shooting at the satellite campus of New River Community College at New River Valley Mall, Christiansburg Police Chief Mark Sisson said Friday night.

NPR: Student Charged In Va. Mall Shootings; 2 Wounded