The Leavenworth brothers have been convicted by an all-white Wichita, Kansas jury of leading a prison rebellion last year. The four black men--Odeil Bennen. Jessie Lee Evans, Alt' Uill and Alfred Jasper--were found guilty of inoiting a riot at the Leavenworth Federal Pcnitentiary in August 1973. During the seven-week trial, state prosecutors relied heavily on the testirnony of prison guards who stated the four inmates "masterminded" the prison uprising. Ho we ver, the deiendants maintain iliey hae been singled out as ringleadcrs bccause all have been active in prison reform movements. The jury handed down its guilty verdict after five days of deliberation. Defense attorneys say they will file motions calling foi a new trial October 7.