On second thoughts :

his appearances have been sporadic he isn't a suspect and the guilty one is always someone you've overlooked.

Ollies scarf was found at a charity shop after being handed in by a woman who found it in a house she bought, where it turns out Ollie was kept, however he wasn't wearing his scarf when he went missing which means it was taken and given to him by someone who had access to his hotel room, the hotel guy!!

some significance lies within the tv not working and having not worked for 8 years still, i think it has a camera in it and its their way of watching children in rooms etc.

the mayor is covering up and leaking info and having people killed, the guy at the station and the guy in prison to stop it getting out as any connection to this kidnapping will ruin him!

then there's the coin that was handed in, then again that evidence may have been tampered with and ollie may have stolen the coin but its unlikely no? when would he have had the chance?

lastly, ollie when lost in the bar may have gone with the guy as he recognized him and knew hed get him home to his mum?