NEW : The case involves her allegations that police mistreated her in custody . There was never hope of an unbiased hearing , her stepfather says . Comment: The American student convicted of killing her roommate is also accused of defaming police . She was sentenced last year to 26 years in prison for killing Meredith Kercher .
NEW : There was never hope of an unbiased hearing , her stepfather says . Comment: The American student convicted of killing her roommate is also accused of defaming police . She was sentenced last year to 26 years in prison for killing Meredith Kercher .