From a psychopathic view he got a really good setup:
(1) active policeman (2) cultural differences to wash the line between appropriate and inappropriate (3) young woman from far away globetrotting with little experience just staying few nights (4) over the top hospitality (5) sleeping over in his own home + tranquilizers
>(“You’re 21 and sleep in someone’s house for free? You get drunk in his house and blame the host?”)
What caught him was the usual over-confidence chasing the ever bigger high:
>Maglio was finally arrested, for another attack. An Australian woman with two daughters had been staying with him, and woken in the early hours to find her 16-year-old in bed with Maglio. She’d been drugged and was non-responsive for five hours. Incredibly, while Maglio was under house arrest for this incident, the police visited and found two new suitcases in his hallway, and two couch surfers in his living room – one with benzodiazepines in her system.