I'm going to try to get someone in trouble at work
Why would you want to get them in trouble?
They keep lying, cheating, and other suspicious things.
I see you are suspicious of your coworker, but it's not right to get them in trouble if they haven't done anything to deserve it. If you don't trust them just try to keep your distance from them while you're at work.
Are you annoyed by them too?
Unless you have real proof of this you should mind your own business and do your job. If you are wrong you could really ruin someone's reputation and life if they get fired.