In the bath, Cocalus' daughters killed Minos, possibly by pouring boiling water over his body. In some versions, it's Cocalus that kills Minos in the bath. Still, in others, Daedalus himself poured the boiling water on Minos, killing him.

What caused the death of King Minos?

He was killed by the daughter of Cocalus, king of Agrigentum, who poured boiling water over him while he was taking a bath. Subsequently, his remains were sent back to the Cretans, who placed them in a sarcophagus, on which was inscribed: "The tomb of Minos, the son of Zeus."

How did Daedalus anger King Minos?

Minos, the king of the island of Crete, asked Daedalus, an architect, to build him a complicated labyrinth to lock up his prisoners. ... Needless to say, King Minos was angry, and he shut Daedalus and his son Icarus in the Labyrinth as punishment. Pasiphae, Minos' wife, however, released them.