Charles L. Killion, 88, a retired FBI special agent who headed a state-run crime laboratory in Fairfax County, died March 18 at Halquist Memorial Inpatient Center in Arlington County.

He had complications from heart disease, said his wife, Nancy Killion.

Mr. Killion became an FBI special agent after Army service in World War II. He worked in the Newark and Baltimore field offices before being transferred to the Washington headquarters, where he became a laboratory specialist in firearms and explosives. His work included the investigation of bombings during the civil rights movement and the assassination of President John F. Kennedy in 1963.

After his FBI retirement in 1973, he became director of the Northern Regional Forensic Laboratory. He retired in 1992.

Charles Lewis Killion was a native of Rochester, Ind., and a 1948 mechanical engineering graduate of Purdue University in West Lafayette, Ind. He received a master’s degree in forensic science from George Washington University in 1971.

His memberships included Vienna Presbyterian Church.

His first wife, Charlotte Land Killion, died in 1978 after 33 years of marriage.

Survivors include his wife of 32 years, Nancy Batey Killion of Vienna; three children from his first marriage, Steven A. Killion of Manassas, Douglas J. Killion of Long Beach, Calif., and Ann C. Longo of Port Orange, Fla.; a daughter from his second marriage, Sarah H. Killion of Vienna; six grandchildren; and seven great-grandchildren.

— Emily Langer