Isn't it a violation for a Lawyer to reveal a conversation with his client? By saying that his client denied contacting the Derstine firm he is revealing a conversation with his client. No, DM has retained him to speak for him aka represent.
I suspect that DM's mother probably brought in the Derstine law firm after watching the appalling job being done by this guy. No she cannot do that, unless specifically requested by her son, DM is an adult.
All of this new info though, is making for an interesting afternoon.