Police ProbetiiNegro CoupleiifiuiFor Murderf\icSHREVEPORT, La. (AP)-Pub-ic safety commissioner J. Earl Downs said Sunday thit city po-ice will question a Negro maid and her husband again Monday in he murder of Mrs. Mary Allen Booth.The couple, Candia Dixon, employed by the Booth farrdly, and tier husband, Ben, 45, had been questioned earlier and released.They were arrested again for further questioning and may be taken to Baton Rdugc on Tuesday for a«lic detector tests along with two other Negroes also being held.The body of Mrs. Booth, 56, prominent Shreveport woman, was found Dec. 18 in woods near Frierson after she had been missing six days. She had been stabbedtn ripnth.jtiii