If they randomly selected your bag, they were looking for bombs etc, they are not looking for drugs because they do not screen luggage for anything like that. Secuirty does not have the power to take away your gear or anything like that, they probably wouldnt even know what it is. If they wanted to, they can call cops, but only on there own time, and not on the time of the companies because it is not there duty. If they found a gun, a bomb or some sort of wepon, that would be a differnt story. If it were customs who checked you bag, then you would be in trouble, but not with airport security. BTW do not take syringes with you on you carry on, because it will be confiscated since it is a sharp object.