To clafiry, Salazar still could be in hot water. He is on the non-medical side the boss. If he is in any capacity either doing clinical things (giving out drugs, suggesting medical treatments) or instructing valid clinicians to do these things, the buck stops with him. He could face various civil and even criminal complaints per all that.
I once was at a soccer match—I coach soccer, also—and an athlete on an opposing team complained of her head and nose hurting after a strong blow to the forehead in a header. Her parents were not there and she'd traveled several hours to the game. The asst coach of that team was concerned but not sure what to do. I told them, I'm not a clinician, however, in my coaching training I learned things that made me feel this could be a concussion or other injury. We went through the basic concussion tests to ensure she did not need an ambulance called immediately, and clearing that, we took her to the local hospital. Turns out she'd broken her nose on the header, but no concussion. Point being, beyond emergency first aid, you do not provide medical treatment, diagnosis, or advice. You get the athlete to those qualified to do that.
This is following proper protocol: a coach is in a position where no licensed medical staff is on site ( the trainer already had left). He sees a possible medical issue, enacts first aid triage to ensure this is not an immediate emergency, then seeks valid medical care for the athlete. By several accounts, in non-emergency situations Salazar appears to have offered specific medical advice, possibly even provided medications. Whether he did this with his own hands or ordered it from Dr. Brown or the now-deceased Nike doc, seems it was way above what any coach at any level is allowed under NFHS, NCAA, USATF, and other governing body rules.
Beyond that, there is the question of if the agents (supplements/drugs) administered were allowable in the doses they were administered. But Salazar never should have been calling the medical shots at all, so if he was, he seems in as much trouble as any clinician. If he was instead making valid requests from those clinicians and they bent the rules, it's on them.