i don't believe my answer to you were any of those things, however, you did not see what or what not occured with the nurse prior to you and the wound. That is hear-say. If you documented the wound correctly, and the nurse in question debrided it (and was there a general "wound care" order? If there was, then that is subjective--and hard to prove--witness or not--that what occurred with the wound was out of the realm of the order) then you can only provide a new assessment that you observe. And this may be laughable, but perhaps an attempt at an order for a wound vac? A suggestion of MD surgical debridement? This could come back on you in that you assessed and observed necrotic tissue in a wound--and did what exactly? Did you document this observation and did you notify the MD? This scenario could play out in a bunch of ways, however, bottom line is that it could be negligent to not have advocated on the patient's behalf when observing the necrotic tissue to begin with. As well as basing a report on hear-say.
Additionally, as awful as it is that I can not get over that one washcloth and one towel is given to a resident with no other peri care options.....is this a policy? Are other items not available? Is there no other laundry available? Because again, hear-say. You are told to only use one---do people get written up for using more than one? Do they do a laundry count? This could also come back and haunt you as you say "we could only use one" and DON says "I never, ever said that!!! That is not policy, that is not written anywhere, and honestly, I can't believe that Christina 12345 was using washcloths over and over for peri-care!! No WONDER the resident had necrotic tissue in the wound!!!"
If the place is a pit, there are many other options for reporting without getting into he said /she said/ that one did stuff. State agencies. The ethics hotline of your parent company. The omsbudsman of the facility. If the facility accepts state/federal insurances, then that is also a thought. Finally, the DON's boss, as apparently this is all going on and the DON is not doing anything to change it.