Can I be charged for informing companies that my company has lied to them?

I was recently employed at a privately owned company. There were three instances that I was ordered to conduct what I believe was an "illegal" act. The first was when I went to replace a circuit board at a college. When we arrived the board was still operational, so my coworker and I were told by the CEO to inform the customer that we had switched out the board, despite not switching it. The second was when a coworker and I were sent to a jobsite and told to "pretend" to install a new circuit board and to inform the customer that we did. The third instance was when my coworkers and I were sent to a business building that had been recently closed and were told by the CEO to take down the cameras. We did not go through with the act because there was a security guard. I recently turned in my two weeks and was told not to come in for two days, then received a text saying that I was terminated. I would like to inform the companies, but I do not want to be drawn into a battle.