Langley started his career in 1970 in Custer County, Oklahoma working as an office deputy. He was hired on with the Oklahoma State Bureau of Investigation (OSBI) as a special agent in 1977. As a special agent, Langley was assigned to the Lawton, Oklahoma office.
In 1970, Langley commenced his career as an office deputy in Custer County, Oklahoma. By 1977, he joined the Oklahoma State Bureau of Investigation (OSBI) as a special agent and was stationed at the Lawton, Oklahoma office.