His behavior is suspect given what we know about Kofi and son. Volker appears to be either in cohouts with Kofi or he's sticking his head in the sand.
Not nessarily, the report did not vindicate Kofi, it only said that their was no smoking gun in the evidence at the half way point. While this appears to be letting Kofi off the hook, you must consider the possibility that there really was not enough hard evidence to prosecute and that it was inopportune to do so at that time. How many years did we wait for a smokiing gun in the Clinton investigation. Sometimes it takes time to prove a known fact and to tie in all the players.