My wife and I were fortunate enough to have David as our guide for the Pablo Escobar tour in Medellin on February 7, 2018.
First of all, we had no real interest or knowledge of Pablo Escobar prior to taking the tour and it was a last minute decision to go on it. It turned out to be perhaps the best tour we have ever been on. And I say that not because of the topic or the locations we went to, but because David was so knowledgeable, spoke excellent English, was so enthusiastic, and provided other great information about Medellin during the tour.
I have friends who are planning a trip to Medellin and I will definitely be recommending David to them.