Jean Harvey, 55, a Gaithersburg resident since 1962 who had been a clerk at the Germantown post office for the last eight years, died May 7 in Suburban Hospital as a result of gunshot wounds she received the day before.

Montgomery County police said the shooting occurred during an argument in Mrs. Harvey's home and that a warrant was issued for the arrest of Gene Sylvester Cann, 35, identified as a family acquaintance. Police said Cann's body was discovered May 7 near railroad tracks between Game Preserve Road and Waring Station Road. They said Cann had been hit by a train and that his death was ruled a suicide.

Mrs. Harvey, who was born in Santa Monica, Calif., was a graduate of the University of California at Davis, where she earned a bachelor's degree in agriculture. After moving to Gaithersburg, she was active in Girl Scout work. From 1968 to 1972, she lived in Vienna, Austria, while her husband, Elmer B. Harvey, worked there with the International Atomic Energy Commission.

In addition to her husband, of Gaithersburg, survivors include three daughters, Erin Harvey of Silver Spring, and Patricia and Dana Harvey, both of Gaithersburg, and a sister, Patricia Smith of Pennsylvania.