Bruce's former employee lost his mind trying  to damage every part of Wayne Enterprises that was spread across Gotham City, forcing Bruce on camera to admit something. Bruce only had a few sentences for the person who who used him as an excuse to hurt dozens of gothamites, and thousands of dollars in damages. Admitting that the person was fired for two reasons, instability and ego.  That Bruce never stole his design that it was a contribution, and that he was properly payed for the work he did.   

 " The truth... Okay... The truth is, you were only ever worth a damn when you worked for me. The truth is you could never accept that I'm better than you. You're a failure....And you always will be." 

Bruce's voice didn't waver, he didn't lie as tore apart  the person with only his words before taking him down  with one hit.