 In the years to follow, Pearson published other studies on American criminal cases, including "Murder at Smutty Nose and Other Murders" and "Five Murders" although these had limited popularity in comparison to his first landmark work on American crime.He maintained an extensive personal correspondence with the Scottish crime writer, William Roughead, the two writers offering support and encouragement to each other in their chosen field of "matters criminous".In 1934 Pearson went to Hollywood to serve as an uncredited writer for the films "Bride of Frankenstein" and "Werewolf of London".>

Pearson died on August 8, 1937 at the Columbia-Presbyterian Medical Center in New York City of bronchial pneumonia.