Do you mean he should have risked life and limb of himself and his family to report something and not fear retribution for blowing the whistle on those in power?
It's his moral and fiduciary responsibility to the dancers in his position as a union rep to report coercive activity. If he didn't want to be in that position, he shouldn't have taken the position.
To bring back the timeline, he claimed to have contracted a beating back in the Fall, months before he went to theater authorities with his complaints and was told to make a detailed report. He claimed to have had second thoughts and hoped that the entire thing was forgotten. He claimed to have been contacted about pursuing the attack months later, and at the least, feared not paying his contracted thug. He sat in a car staking out Filin and reported when Filin left the theater, participating directly, which led to the attack.
He did not contract the attack because he feared "risk[ing] life and limb of himself and his family to report something and not fear retribution for blowing the whistle on those in power." He contracted the attack and after he was recontacted about the attack, he then went to higher ups with his complaints and allegations and was told to make his case. Did you expect them to say, "Oh, yes, we believe you without proof, and we will act without proof"?
Or would he have been better off to enter into negotiations in a powerful position, without going to the police?
He wasn't asked to go to the police. He was asked to submit an official report as a union official to the theater authorities and to use the existing process.
He's on the same side as Tsiskaridze, and Tsiskaridze has powerful protectors, as we continue to see in the press reports. Had Dmitrichenko not contracted a thug to attack Filin, there would have been a reasonable chance that Tsiskaridze's friends in high places could have used any evidence to sack Filin. I would say he made a stupid choice.
I think everyone who says, e.g., Joy Womack should go to the police are very brave from the sidelines, but they have no consideration of the consequences she and her family will face.
Joy Womack's situation is very different than Dmitrichenko's: Dmitrichenko is in jail for arranging for a physical attack on Filin, the prosecutor is attempting to hold him responsible for the outcome of the attack because it wouldn't have happened without his initiation, and Filin is trying to hold him responsible for the suffering and loss of eyesight through monetary compensation.
Womack has done nothing illegal and isn't being held by the police. Were she to go, the police could shelf it, they could ignore it, they could say that there's not enough evidence, or they could take the "misunderstanding" route that Urin took. she'd be asked to make a formal statement, and, if there would be a case, she'd be asked to testify. There are enough people in high places that would love for her to give evidence, and if what she says is true, and she had proof, I'm sure there are plenty of Russian dancers who would be happy for her to take charge. As an outsider, she can have a career anywhere in the world, and she wouldn't be leaving her family in Russia.
I don't know if she has any obligation to report wrong-doing -- in some places, she'd be obligated if she saw an illegal act, but know one would have known had she kept what she had seen to herself and not spoken to the press -- but the theater has every right to say, "You have a problem, go to the authorities, and we will back you in every way. Otherwise, don't think that you can sling mud in the press and expect to walk away and have us sit back and do nothing." It was very astute of Urin to posit it this way.
How often do police admit to misconduct? I would estimate close to never.
And that is Dmitrichenko's reality. You state earlier that going to the authorities to report the corrupt would put his life and that of his family in danger. What would you expect the outcome to be if he claims police brutality and that the Chief of Police is lying through his teeth?