A fundamentalist Baptist preacher arrested and indicted last week in an alleged conspiracy to bomb a San Diego abortion clinic will remain in jail pending his trial on the charges, a federal magistrate decided. Granting a request by federal prosecutors, U.S. Magistrate Barry Ted Moskowitz ordered that the Rev. Dorman Owens, leader of the Bible Missionary Fellowship Church in Santee, be detained without bail at the downtown Metropolitan Correctional Center. Moskowitz said his ruling was based on "clear and convincing" evidence that Owens has "attempted and will continue to attempt to obstruct justice" by urging other defendants in the case not to cooperate with prosecutors. Owens, 54, and six members of the fellowship were arrested a week ago and charged with conspiring to bomb the Family Planning Associates Medical Group on Alvarado Road in July.