Robert D. Peloquin, 82, a former Justice Department lawyer who was president of Intertel, an intelligence and security subsidiary of Resorts International, which owns casinos in Atlantic City, Las Vegas and the Bahamas, died March 24 at a nursing home in Frederick after a heart attack.

Mr. Peloquin ran Intertel from 1970 until 1985, when he became chairman and executive vice president of Resorts International, a position he held until he retired in 1990. Intertel’s clients included Howard Hughes, ITT and the shah of Iran.

At the Justice Department, which he joined in 1957, he ran the first Organized Crime Strike Force in Buffalo, where he went after the Magaddino and Profaci Mafia families. He investigated mob control of casinos in the Bahamas and investigated the 1964 slayings of civil rights workers Andrew Goodman, Michael Schwerner and James Chaney in Mississippi.

In 1966, he received an outstanding performance award from the Justice Department. He soon left Justice to work with William Hundley, a former Justice Department prosecutor. Their firm represented the National Football League and advised it on security issues. Resorts International was a client before hiring Mr. Peloquin to run Intertel.

Robert Dolan Peloquin, a native of Fall River, Mass., received a bachelor’s degree in 1951 and a law degree in 1956, both from Georgetown University. He was a Naval Intelligence Officer from 1951 to 1955 and retired from the Reserve in 1981 at the rank of commander.

In 1990, he moved to Plantation, Fla., from Bethesda.

He was a member of Catholic Shrine of the Most Blessed Sacrament in Washington and the Knights of Columbus.

A son, Mark Peloquin, died in 2010.

Survivors include his wife of 59 years, Margaret Sheridan Peloquin of Plantation; five children, Suzanne Bready of Gaithersburg, Robert D. Peloquin Jr. of Fort Lauderdale, Fla., Charles Peloquin of Waynesboro, Pa., Christine Lightfoot of Potomac and John Peloquin of Sebring, Fla.; and 14 grandchildren.

— Lauren Wiseman