He graduated from Regis High School in New York City and Siena College in Loudonville, New York. Cashill received his Ph.D. in American Studies from Purdue University in 1982.
He graduated from Regis High School in New York City and Siena College in Loudonville, New York. Cashill received a higher-level academic qualification, a Ph.D., in American Studies from Purdue University in 1982.