Integrity has zero to do with whistle-blower complaints. The integrity of the whistle-blower has nothing to do with complaints filed other than to discredit the whistle-blower. Take a look at the complaints regardless of the whistle-blowers credibility. Cops use druggies to get information to convict other druggies. According to your above  logic, credibility shouldn't allow cops to build cases because of who gave them the information!?