Clothing from a kidnap victim would never be taken out of its evidence bag and shaken over a floor. It would be over an exam table to check for hairs, fibers and trace evidence. The show consultants need to watch more CSI.
The bus conductoress injected herself with insulin on the wrong part of her arm. Insulin has to be injected into fatty tissue which is why the abdomen or thigh are ideal sites. The upper arm can be used but it has to be the tricep area at the back.
In the locker room at the bus depot, it shows the man cutting the padlock with a pair of tin-snips. Wouldn't work. They would need a pair of bolt cutters.