Is it obligatory to re-donate money that was illicitly acquired and then donated to a sick sorcerer who died of cancer, given that he was a sorcerer?

A Muslim must repent from ill-gotten wealth and spend it on charitable causes, such as giving it to the sick and the poor. Your act of disposing of the money by giving it to a needy sick person is correct, and you are not entitled to reclaim it. Scholars have differed regarding the disbelief of a sorcerer, and no one has the right to declare a Muslim an infidel before a ruler's judgment. The Malikis hold that a sorcerer should be executed if his disbelief is established by evidence and judgment. According to the Shafi'is, if a sorcerer's magic does not entail disbelief, then it is a transgression that does not warrant execution. You are not obligated to reclaim the money after the man has acquired possession of it.