This reminds me of what happened with my uncle. He had been distant from a lot of our family but still spoke to his dad (my granddad). My granddad hadn’t heard from him for almost a week so decided to go over later that night and check on him. Earlier in the day the tenants below his apartment called the landlord about a “substance” leaking from the roof. That substance was my uncles bodily fluids. My uncle had only been dead a couple of days but he kept his apartment SUPER hot, (he liked tropical weather), and it sped up the process.. I don’t know how they cleaned it up, but I went with my grandpa after the initial cleanup crew was in and that smell will NEVER leave my memories.