How do I defend myself from accusations of neglect?

While I was providing care to someone, my unit nurse came looking for me to say one of my residents had made a huge mess and needed to be changed. I was in the middle of bathing a resident and took about 30-40 minutes to finish with them. When I went to the resident who made the mess, he was sitting in his wheelchair soiled with vomit, feces, and urine. There were bodily fluids on the floor as well. The nurse was aware I was busy and this resident sat in that condition for the time it took me to get to him. No one cleaned him up or atleast cleaned the floor. This resident could walk and risked falling due to the fluids on the floor. As I cleaned him, he said he was not feeling well. I informed the nurse, he was not feeling well and had what looked like blood in his vomit. The next day I noticed said reaident did not get out of bed nor eat any of his meals. He also had a putrid smell to his bowels. I informed the nurse of his condition. Also I informed her he may have an infection due to the familiarity of the smell from his bowels. I notified multiple individuals. Over the course of the day I checked on him and provided him with water. Another CNA and I informed the nurse again that this main was very ill and not being himself. Between 12:30p and 1p, lunch trays came out. I took my reaident his tray which he refused. I exited his room. There is a CNA whom he responds very well to and asked him if she would help me get him together after lunch. We are not allowed to provide care during meals. She repeatedly insisted I continue with lunch and she would clean him up. I oasses out trays, fed residents, and picked up trays. I begin my last rounds. I woeked from one end of the hall to the other. When I finally got to my last resident just to check on him, I found him deceased. The facility is now blaming me for his death saying I did not check on him any time during the day. The CNA who was to provide care never went back to his room, the unit nurse did go to my residents room at any time even after I and other CNAs informed her off his condition. The unit nurse never made documentation of what I and others reported to her. The night unit nurse never reported another CNAs concerns either. After he died the nurse came in and made a late documentation stating she took his vitals which she did not. This facility failed this man and he should have been sent out days prior due to his condition. I have multiple witnesses of this mans condition, the care I provided, and reports that CNAs made. Due to not documenting his care, the nurse lied and said she was never informed. Now the facility has moved to have my certification revoked and pinned a charge of neglect on me. They are trying to cover up the nurses neglect. I have witnesses but they are afraid to speak due to retaliation of the facility. These nurses never provided care nor documented our concerns. What can I do to protect myself and save my license. I did everything I could including informing the state. I have never had any disciplinary actions nor complaints taken out on me in the years I have done this. I am tired of facilities covering up their wrong doings and CNAs most times being blamed. I will not take blame nor be the scapegoat for the death of my resident. What can I do to protect myself and my license?