A new worker, who is not even 20 years old, has been sexually harassing my employees by staring at their sexual organs. I have put hidden camera's up in different locations but we have not been able to find any quantifiable evidence supporting their claim. He only seems to do this to a few, but people have begun to gossip. I believe he may of stopped after hearing about it. I want to know a few things. How obvious and how long does this staring have to be considered quantifiable evidence? How many times do we have to catch him staring to have a case? Can my employees purposely try and make him stare by always being in his view when he works, or can he use this against us? If we catch him trying to hide this staring, can it be considered as evidence?