the cause of the accident is under investigation. the uk prime minister boris johnson had some good news about queen elizabeth on saturday, saying she was quote, on very good form. this comes at the after buckingham palace said that her majesty was told by doctors to arrest for another two weeks, following a brief stay in the hospital. now back to dateline. hospital now back twelcome back to datel. i'm natalie morales. rob starr meek mill was in prison for parole violations and his supporters were on a mission to get him freed. his legal team uncovered damaging information about the key witness at his trial almost a decade earlier. now mills controversial case was about to take another stunning turn. once again, lester holt with dreams and nightmares, the meek mills story. >> tuesday, april 24th, 2018.