I've been thinking more & more about the killer's "deviation" with Shannan Gilbert. The extensive searches by foot, by air & in water haven't turned up any sign of her remains.
7/07 Maureen Brainard-Barnes was disposed of at Oak Beach
7/09 Melissa Barthelemy was disposed of at Oak Beach
5/10 Shannan Gilbert - ??
6/10 Megan Waterman was disposed of at Oak Beach
9/10 Amber Costello was disposed of at Oak Beach
IMO, the only reason the killer would deviate in his disposal plans with Gilbert would be to deflect suspicion away from himself. However, the only men who have been named in the news which caused public speculation & suspicion, were Joseph Brewer, Peter Hackett and Michael Pak. Therefore, IMO, the killer *has* to be one of those 3 men. Then, following with all the various profiles, the killer is reportedly someone very familiar with the Oak Beach area. IMO, that eliminates Pak. Finally, all the victims were Craigslist prostitutes. There's nothing to suggest that Hackett (being married) would have a "need" for a prostitute. Both Brewer and Pak obviously have a connection to prostitutes - Brewer as a customer/John and Pak as a "driver" who shared in their earnings. But Pak doesn't have that same level of familiarity with Oak Beach specifically. That narrows it down to Brewer. IMO, Brewer is definitely the killer. And he disposed of Shannan elsewhere thinking that perhaps police would descend on the area back in May of 2010. When they didn't, he got cocky/confident and then killed Megan Waterman in June and then Amber Costello in September. Hopefully, law enforcement will be able to match up forensic evidence from him or his home with evidence found with one of these victims.
Just my 2 cents...