I am also a retired RN. I believe your SIL. She should report this incident to her state med. board. She should also take herself to a chiropractor. Post accident, this professional was the only one who got me walking. I was afraid at first. But...the relief, kindness and understanding was amazing. My chiro. listens and I firmly believe this alternative medicine practice has its place. I use it in conjunction with my traditional fibromyalgia regime. The only thing I can say about pain is that it reminds me I am alive. But... so do my grandchildren.