Credited 8 times. <br />
Lab Man in #8 <i>the Crimson Kiss</i><br />
Fingerprint Man in #74 <i>the Startled Stallion</i><br />
Frank Wilton in #87 <i>the Singing Skirt</i><br />
Lab Technician in #134 <i>the Left-Handed Liar</i><br />
Expert in #147 <i>the Melancholy Marksman</i><br />
Fingerprint Expert in #170 <i>the Libelous Locket</i><br />
Expert in #191 <i>the Devious Delinquent</i><br />
Fingerprint Expert in #196 <i>the Capering Camera</i>