What caused bans of D. J. Williams and Ryan McBean?

The National Football League sentenced to suspensions the linebacker D. J. Williams and defensive lineman Ryan McBean of the team Denver Broncos for violation of steroid policy. These football players were banned from six games. But they were not suspended for administration of steroids. They didn’t test positive for steroids or other prohibited medications. They were accused in providing “non-human” urine samples to the officer of drug testing.
D. J. William confirmed that he had never tested for any prohibited product during eight years of his career. The football player noticed that he was proud of his records. He mentioned that he was also proud of his manner in that he conducted himself, being an athlete.
Peter Schaffer, the defensive attorney for McBean, confirmed that the NFL had violated rights of the defensive lineman. He noticed that since McBean had never tested positive for any forbidden drug, the NFL didn’t have any right to suspend him.
Peter Schaffer noticed that he wanted to make it clear that neither D. J. Williams, nor Ryan McBean tested positive for banned medications.
A lawsuit was filed in Denver County Court against suspensions of these football players.
The players affirmed that the drug testing officer had violated certain rules related to the procedure of collecting urine samples.
Schaffer noticed that several similarities had been between his client and Ryan Braun. Braun won his appeal related to his suspension from 50 games for administration of testosterone. Ryan Braun could prove that Dino Laurenzi, the drug testing officer, violated steroid policy.
As for Laurenzi, he was defended and supported by various anti-doping agencies. The WADA also supported this drug testing officer. It was claimed that there was the same procedure of collecting and sending urine samples not only for the MLB but also for the WADA.
But as for the drug testing officer that collected samples of Williams and McBean, another attitude was displayed to him. He was fired by the NFL for wrong doing his duty.
At the hearing the NFL administrators admitted that the drug testing officer violated the chain of custody for urine samples.
Nevertheless, the appeal on behalf of the football players was rejected.