On another note about the missing 'Tunisian' suspect.
I wouldn't be convinced at this stage that this bloke was the perpetrator - as it seems all to obvious to drop your paperwork with you name on it at the crime scene.
Seems to be a habit of some criminals - but, no better way to have the coppers chasing some bugger who had nothing to do with this particular crime.
Of course - DNA and the like should show if it is him. But, the time it takes to get a match there could be of good use to someone else who is setting him up.