"the way he kept changing his story" - she seemed to change her story just as much as he did
"and the fact that she was so bruised" - she had a couple of small bruises which could easily have been consistant with consensual rough sex (which he claimed it had been)
"and also that the sex was unprotected while she had condoms right there in her bag" - no evidence of this, her word only, even the viewers didn't see if this was the truth
Reporting it earlier wouldn't have guaranteed a conviction but it would certainly increased the chances. For those who did not watch the program, the guy followed her to her hotel room (both had been drinking) when she went to change her shoes, and once inside they started kissing and ended up on the bed. She admitted she was happy for this to happen but when he started being more advanceful she decided she didn't want it to go any further, but he forced her.
Afterwards she told no-one, and went back to work to find out that her rapist colleague had been promoted to be the boss's deputy, a position (I think) she was hoping for. This pissed her off big time (she admitted this in court) so went home and told her flatmate what had happened. She returned to work the next day and told her boss she had been 'sexually assaulted' by the guy, and that he must sack him. Obviously the boss could not do that and told her if she was serious then she should go to the police. He sent her home and her flatmate eventually persuaded her to officially report it.
For obvious reasons, date-rape can be incredibly difficult to prove and I felt the message given by the program was that if it does happen to you, then you need to report it as quickly as possible as otherwise subsequent events can transpire against you - as they clearly did here. They gave ammunition to the defense which left the jury no alternative as to find the guy not guilty.
