Rio the hammerhead, that's what they called him. Rio Alex Bulo would use two hammers, one in each hand, to bludgeon his victims to death.

The serial killer would leave a trail of victims in his wake. From Surabaya to Semarang, and finally in Purwokerto, Rio would be caught after a vicious attack in the Rosenda Hotel. The bloodstains spattered the walls and the ceilings...

But even his arrest would not stop his murderous urges, even in prison, Rio would kill a man many considered his friend...

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