The inspectors immediately find footprints outside of Ackroyd's study window. Who do these initially point to as the murderer?
DR. SHEPPARD, WHO HAS TWO PAIRS OF SHOES THAT MATCH THE FOOT
MAJOR BLUNT, WHO FREQUENTLY WALKS AROUND OUTSIDE FERNLY PARK
RALPH PATON, WHO HAS TWO PAIRS OF SHOES THAT MATCH THE FOOTP
do these initially point to as the murderer? DR. SHEPPARD, W