My Father die in 2001 due to medical negligence can i still sue the hospital or clinic

In 2001 two three years after i came here with my mom my father happen to have a big problem with his heart my sister took him to the hospital his heart were beating fast he couldn't breathe instead of keeping him to monitor him their a machine on him with a string around his neck and send him home with it he has to go back in couple days with my sister well he went back their remove the machine a few days after their remove it one morning he pass away in my hand calling me Sam i can't breathe i tried everything i could nothing works well i never thought anything of it i was new here didn't know the law how things works i couldn't ask my sister cause their hated us we didn't talk now i'm having flash back sitting thinking of what happen started to realize what happened that deep in my heart i know it was a negligence now i'm wondering if there any action i can take against them