Daniel Crowley, 75, a lawyer who was the founding partner of the Washington firm of Crowley, Hoge & Fein, died of pancreatic cancer Aug. 1 at his home in Washington. His death was confirmed by his wife, Susan Crowley.

Mr. Crowley was among the first practitioners in the Washington area of what is known as “preventive law,” which emphasizes mediation as an alternative to a court trial. He founded his law firm in 1967 and continued to practice until his death.

Daniel Homer Crowley was born in Baltimore. He graduated from Yale University in 1960 and then served three years in the Navy.

He graduated from the University of Maryland Law School in 1966.

Mr. Crowley played violin and viola and for 30 years was a member of the chamber orchestra at St. Columba’s Episcopal Church in Washington. He was an amateur photographer and an enthusiastic sailor who kept a boat on the Chesapeake Bay for 35 years.

Survivors include his wife of 47 years, Susan Linkroum Crowley of Washington; two daughters, Anne Barnes Crowley of Washington and Megan Lyn Crowley of Aurora, W.Va.; and three grandsons.

— Bart Barnes