There may be occasions where a case has been stopped, but further evidence has come to light and after a review of the evidence a prosecutor decides that the prosecution test has been passed.
Fel arfer, mae canlyniadau’r achosion hyn yn mynd o blaid yr apelydd, gan fod awdurdod wedi ailystyried ei benderfyniad cychwynnol ar ôl cael tystiolaeth ychwanegol ynghylch hawliad yr apelydd.