Who was first to study blood splatters and write a bookon it he also discovered finger print brush
It's Blood SPATTER. Food splatters, paint splatters, ink splatters... blood SPATTER. :) That may help you get the right information for your search. I believe the first person in the US to study and teach blood spatter analysis was Herbert MacDonald- but I'm not sure if he invented the fingerprint brush or not.
I believe this all started in Europe, Sherlock Homes Scotlan Yard...I could be wright or wrong.
herb mcdonald corning new york