My Friend Have Suffered With Hepatitis(not Sire Of The Type)and

my friend have suffered with hepatitis(not sire of the type)and liver damage.he was admitted to a local hospital where he was given iv treatment.suddenly he got serious and reffered to another hospital where he was kept in icu.after few days he shifted to normal ward and within three days his bp levels went below normal and shifted again to icu.and he was dead the next day.we are not sure how he was dead whethee due to negligence or liver damage is not curable since he was declared to be normal and suddenly he was dead.please help with some advice