personal relationships with Armstrong — -Antwon is Armstrong’s long-time foster-brother, and Solomon is Armstrong’s biological brother. This rela tionship creates a potential bias and a motive to provide false information, which could lead to the release of Antwon’s and Solomon’s brother from prison. See Williams v. United States, 452 F.3d 1009, 1013 (8th Cir.2006) (noting the extent of the witness’s personal relationship with the defendant should be considered in evaluating the credibility of the witness). Neither Antwon nor Solomon came forward to testify at Armstrong’s trial, despite receiving telephone calls from Armstrong’s counsel or her investigator providing them with information about the trial and offering to reimburse them for their travel. See McCauley-Bey, 97 F.3d at 1106 (<HOLDING>). At the time of the habeas hearing, Ant-won
holding that a witnesss testimony or an exhibit may not explicitly and directly contain an opinion as to a trial witnesss credibility recognizing the witnesss failure to come forward promptly may impact the credibility of the witness holding that promises made by the prosecution to a witness in exchange for that witness testimony relate directly to the credibility of the witness holding that a trial witnesss testimony as to the credibility of another witness was prejudicial error holding that the prosecutor acted improperly when he misstated that the key witness had not come forward until the day before trial when the witness had actually come forward over two months before trial