Final answer:
B. Calvin Goddard pioneered the use of galvanoplastic compounds for preserving footprints and ballistics.
Step-by-step explanation:
The pioneer in the use of galvanoplastic compounds for preserving footprints and ballistics is B. Calvin Goddard. Goddard, an American forensic scientist, developed a method called bullet identification or ballistics fingerprinting, which involved analyzing the unique markings left on bullets and cartridge cases. He made significant contributions to the field of forensic science and his work on ballistic identification revolutionized criminal investigations.