Warner Bros. is zeroing in on Wesley Snipes for a key role in “U.S. Marshals,” the studio’s follow-up to “The Fugitive,” sources said. A deal is not yet set for the part, but could happen soon. The picture centers on Sam Gerard (Tommy Lee Jones) and other marshals as they track down another fugitive. Snipes would play the man on the lam, Sheridan, who is described as an extremely smart, savvy fugitive who outwits the marshals. The interest in Snipes came after a screening of Snipes’ upcoming “Murder at 1600,” to be released by Warner Bros. in April. Another key role, that of Roach, a member of Gerard’s team, went out to Cuba Gooding Jr., but it is still open. Snipes is repped by Doug Robinson at Endeavor. Stuart Baird is directing the pic, and Arnold & Anne Kopelson are producing.