Police in Liberia said they are looking for an assistant Baptist pastor in connection with the murders of an American missionary and her 10-year-old daughter. Libby Senter, 47, a native of Cliffside, N.C., and her daughter, Rebecca, were found stabbed to death Wednesday in their home at the American Bible College at Yekepa, a village 200 miles northeast of Monrovia. Police said clothes, shoes and keys belonging to the Rev. Benjamin Moley Morris, 32, a Liberian, were found at the scene. Police said Morris is the assistant pastor to the dead woman's husband, the Rev. George Senters.