 Asbury wrote that Dolan was known as a particularly inventive criminal, who perfected a variety of devices widely used for assault and murder throughout the underworld.According to Asbury, Dolan designed a copper eye gouger to be worn on the thumb and used it both in criminal activities and in battles with other gangs.Dolan himself allegedly owned a personally designed pair of boots with sections of a sharp axe blade embedded in the soles, which he used to stomp a downed victim.