Here's the best method for catching a lying coworker or boss in the act — and how to call them out when you do

• Karen Donaldson is a communication coach and body-language expert.
• Donaldson said the "triangle method" can help you catch a liar in the act.
• The "triangle method" includes checking for signs of lying in speech, eyes, and body movements.

People will manipulate others for their own gain; it's a truth most of us are familiar with by now.