At age 57, he was a zoologist from Johns Hopkins University and the only expert witness allowed to testify for the defense. His testimony emphasized the compatibility of evolution with Christianity. Following the Trial, he chaired a group of scientists who raised money to help John Scopes attend graduate school.
He was the 44-year-old “Hustling Druggist” owner of Robinson’s Drug Store, where the local plans for the Trial were developed. He was chairman of the Rhea County school board, a correspondent for several Tennessee newspapers, and a great promoter of the community. Following the Trial, he led efforts to establish Bryan College and served many years on the college's board of trustees.
At age 24, he was the defendant in the Trial, although his only statement on the record was his declaration at the end that he believed the anti-evolution statute was unjust and he would continue to oppose it. Following the trial, he left teaching and eventually made his career working in the petroleum industry.