David Saul Berkley, 26, a graduate of Walt Whitman High School in Bethesda; his wife, Aline Elizabeth Berkley, 25, and their nine-month-old daughter, Jessica Elizabeth, were stabbed to death Dec. 18 in Detroit, where Mr. and Mrs. Berkley were students.

A spokesman for the Detroit Police Department said Mr. Berkley was on the campus of Wayne State University, where he was studying for a doctorate in anatomy, when he was accosted by an unknown assailant or assailants and stabbed to death. The attacker or attackers then took Mr. Berkley's house keys and identification and went to his residence, where Mrs. Berkley and the child were slain, police said. The spokesman said police had no suspects and that the investigation was continuing.

Mr. Berkley was born in Boston. He and his family lived in Rockville from 1961 to 1967 and then in New York and California. They returned to this area in 1971. After Walt Whitman, Mr. Berkley attended Grinnell College in Grinnell, Iowa, and graduated from the University of California at Santa Cruz. He was on a fellowship at Wayne State at the time of his death.

Mrs. Berkley was born in New York City and reared in California. She and her husband met while they were students. She graduated from the University of California at Santa Cruz and was studying law at the University of Detroit, where she was a member of the law review.

Jessica Elizabeth Berkley was born in Detroit.

Mr. Berkley's survivors include his parents, Burton and Carol Berkley, and a sister, Florence, all of Bethesda, and a grandfather, Maurice Goldberg of Sarasota, Fla. Mrs. Berkley's survivors include her parents, Norman and Aline Felton of Malibu, Calif.; a brother, John, of Montpelier, France; a sister, Julie, of Los Angeles, and a grandmother.