Is no-one else disturbed that the police were aware of several men would are capable of commiting these acts??? The frightening thing is not so much that it has happened, but that it was so likely to, and will no doubt happen again.
And I'm not buying that this bloke is guilty, the killer has been making a mockery of the police, dumping the bodies right under their noses, he's obviously planned this for some time, and is careful about what he does. I don't believe he could be caught so quickly and easily. My predicitons are as follows:
This guy they've arrested is weird and dangerous, but not actually guilty. He is, however, suspicious enough for him to be convicted by the press. Expect a media storm to errupt over the next few weeks, with him damned from the offset. Amid this high-profile frenzy he will be tried, and found guilty (of course) by a jury who cannot help being biased. The real killer will have stopped murdering now someone has been arrested and charged with the murders, and will quietly slink off into the night, probably to wreak more havoc (on a smaller scale) somewhere else.