does anyone do pro bono work?

I’m from florida, and my sister recently passed. The sheriffs department has done little to nothing to investigate the situation and has written it off as an accidental overdose because of her past drug abuse issues. they didn’t even check her temperature for time of death. it has been three months and they haven’t questioned anyone. my family absolutely cannot afford a private investigator and we desperately need one. if anyone knows any PI anywhere between orlando and sarasota, that would be willing to do pro bono work, please let me know. is pro bono even a thing for private investigators? idk. i’d appreciate any advice.