After reading most of the news stories and interviews I can't see anything that would make the parents look suspicious.On the other hand why would abductors choose to kidnap a girl from an area that 1)has a huge wall that would make the abduction more difficult, 2)is just feet away from neighbors that could easily hear, 3) has dogs that bark.
The abductors sure took a big risk!
1) It isn't clear to me whether the gates in the wall have two way locks on them or only one way; if one way locks, then the walls are not a significant deterrent to a reasonably athletic perp. Up and over the wall to get in, then out through the gate.
2) Neighbours being able to hear is only important if there was something to hear. For one thing, this is Tucson and it was already getting warm enough for many people to run their swamp coolers or a/c, which would tend to mask other sounds.
3) Dogs that bark tend to be ignored. The owners and neighbours learn to tune them out or the humans would go nuts alerting every time there was a sparrow invasion of Dog Air Space Territory.
Research seems to indicate that psychopaths have an abnormally low reaction to anticipated aversive events. For instance, one study had volunteers place a hand on a metal plate that would heat up rapidly to uncomfortable (but not harmful) temperatures. The researchers played a tone a few seconds before heating up the plate. They hooked up the EEG monitors and away they went.
The normal participants in the study started to show a marked response as soon as the tone was played before the heat was turned up. The psychopaths in the study showed almost no anticipatory reaction to the sound of the tone, even though their reaction to the actual heated plate was the same as normal volunteers.
What this means is that psychopaths have a much lower response to anticipating potentially bad things happening to them. It leads them into risk taking because it simply doesn't bother them very much to think of the motorcycle they are riding wildly crashing or getting caught committing some crime.
This is something that has been observed for over 60 years. For instance, during WWII, the military experimented with deliberately selecting for psychopaths as fighter pilots, thinking that their relative fearlessness would be an asset in fighter combat. They rapidly discovered that psychopath fighter pilots were just as likely to shoot down someone on their own side, just for the fun of it. Or deliberately take huge risks and crash the jet, again, just for the fun of it.
That program was abandoned quickly.
