Munroe if that was someone that I worked with and they did that to me I would have them and my boss in court ASAP. Esp, if that refelected on my ability to oversee jobs. There is no way in hell that I would take that lying down.
If I felt like I could not research it an represent myself, I would hire an attorney if necessary. It really ticks me off for people to spew their lies about others with no regards to the truth. His/her a$$ would prove that I was a drunk. I believe it was slander, will you win? What will you win? probably nothing ,but taking this @ss to task may make them stop and think before they open their mouth again. This is what I found on slander
slander - legal definition