With no evidence placing a teenager at the scene of his pregnant 14-year-old girlfriend's grisly murder, prosecutors left jurors with no choice but to acquit the 22-year-old man who admitted watching Chauntae Renee Jones die, one distraught juror said last night. ``We had to keep reminding ourselves he's innocent unless we can prove otherwise,'' the juror, who did not wish to be identified, told WCVB-TV (Ch. 5). ``It's not that he's not guilty and it's not that the defense won, it's that the prosecution couldn't make the case.'' The juror said the decision to acquit Kyle Bryant in the murders...