I would love to believe that they had no knowledge of what was going on as I assume that by being in Ibiza and working the bars they were somewhat streetwise and in the real world who gets offered a holiday in South America for nothing with no strings?
Although they have mentioned that they were scared for their families I find it hard that they did not risk approaching anyone in Peru at any of the location they went or on entering the country in passport control, customs etc to avoid the potential for what did happen in the end.
I cannot judge them as individuals as I do not know them but one thing struck me on seeing the first video and the pictures on the news was that having been arrested and in detention for 2 weeks that McCollum Connolly had her hair up like she was going out to party. Now this could be a middle aged strange view on things but it did strike me as a bit "showie" considering the circumstances.
According to reports there are a reasonable number of British people in detention for similar offences all pleading their innocents, difficult to see that they are all innocent and that goes for all of the other Foreigners.
Cannot see any mitigating reasons why they will be not found guilty, but I wish them luck.