Wealthy family all over Baltimore (not sure if connected to Gibson Island)
Responsible for Cold Water Creek Maryland -> Thousands of cancer deaths
"In 1867, the Mallinckrodt brothers, Gustav, Otto and Edward, founded G. Mallinckrodt & Co. in St. Louis, Missouri. The Mallinckrodt family had immigrated from Germany, and Otto and Edward both returned to Germany (leader in Chem at the time) for adv. training."