Bergeret is famous for his early use of insects in a criminal investigation making him one of the first forensic entomologists .
He was a friend of Louis Pasteur ( 1822 -- 1895 ) .
friend is famous for friend 's early use of insects in a criminal investigation making him one of the first forensic entomologists .
He was a friend of Louis Pasteur ( 1822 -- 1895 ) .