>>So, is there any decent links to any easily comprehensible credible source floating around here in the day and age??
Lott. He’s done the research and his findings are credible and well-supported.
But, Progressivism is a Humanist religion and gun control is essential to their stated goal of progressing man to perfection through regulation and social engineering.
btt
They follow federal defination of shooter event.
Data is grouped as All, School, and Business
Covers 2000 - 2015 San Bernardino, Ca shooting.
They attempt to verify primary sources. They don't report specific type of firearm beyond rifle or handgun.
Their FAQ page discusses methodology and limitations.
See my 2/20 comment (23) re: Florida school shooting...
If your more interested in trends, look at Economic Insecurity and the rise of gun violence at US schools, Pah, et.al., 2017.) They created their own composite database, but have not yet asked for access.
Please feel free to contact me.