Abraham Dash, a professor at the University of Maryland law school who specialized in criminal procedures and administrative law, died Jan. 12 at his home in Bowie, Md. He was 86.

The cause was a heart attack, said his stepdaughter, Susan Gaffney.

Mr. Dash was also an Air Force bomber pilot during the Korean War and a lawyer with federal agencies.

Abraham Dash was born in Camden, N.J. He joined the Navy when he was 17 and received a fleet appointment to the U.S. Naval Academy in Annapolis. He left the Academy to fly for the Air Force.

He left active military service in 1955 and graduated in 1957 from the University of Nebraska. He received a law degree from Georgetown University in 1959.

For 10 years he was a federal lawyer, including stints as director of litigation in the criminal division of the Justice Department and service as deputy chief counsel to the Comptroller of the Currency. He also served in the Air Force Reserve in the Judge Advocate General’s Corps until retiring as a lieutenant colonel in 1987.

He joined the faculty of the University of Maryland law school in Baltimore in 1970. He retired in 2005 but continued teaching as a professor emeritus. For 10 years he participated in a project on criminal jury instructions.

His first wife, Barbara Crissey Dash, whom he married in 1953, died in 1985.

Survivors include his wife since 1991, Mary Catherine Gaffney Dash of Bowie; a son from his first marriage, Franklin Dash of Bowie; a stepson from his first marriage who took his surname, Gregory Dash of Clinton; two stepdaughters from his second marriage, Judith Robson and Susan Gaffney, both of Alpharetta, Ga.; one sister; one brother; three grandchildren; and two great-grandchildren.

A stepson from his first marriage, who also took his surname, Michael Dash, died in 1961.

— Bart Barnes