Barnett Abba Slepian (April 23, 1946 – October 23, 1998) was an American physician and abortion provider who was assassinated in his home by James Charles Kopp, a militant member of the US anti-abortion movement.

On October 23, 1998, Slepian had returned from synagogue, where he was attending a memorial service for his father, and was preparing soup in his kitchen when he was struck by a bullet fired through his window.

[4] Earlier that afternoon, Slepian's wife Lynne had forwarded a warning of potential attacks on her husband to a local police inspector.

[5] Within days of Slepian's murder, anti-abortion groups rallied and staged clinic protests in Buffalo and Rochester, New York.

[6] Following Slepian's murder, Kopp fled the U.S., being placed on the FBI Top Ten Most Wanted list, but was arrested in France in 2001 and extradited.