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.
Langley began his professional journey in 1970 as an office deputy in Custer County, Oklahoma. In 1977, he became a special agent with the Oklahoma State Bureau of Investigation (OSBI) and worked out of the Lawton, Oklahoma office.