Unusual Suspects: Everyone in The Killing is a potential perp

In a rare disagreement, I am surprised that friend AW completely dismisses The Killing, which M and I continue to find very engaging on almost every level - sure, it's over the top at times and highly manipulative, adding new clues and information episode by episode though we would expect that the cops would have uncovered a lot of these leads in the first few days of investigation, and, more disturbing, many of the leads are there just to tease us along and keep the series moving. Still - the series does keep moving. Enos/Linden remains a strong if somewhat opaque lead character, her partner, Holder, a very funny and sympathetic sidekick as a unconventional undercover cop with a troubled past and a hip-hop attitude. At end of episode 8 of Season 2: the story obviously now focusing on the Indian casino as the scene of the crime, but it's less clear by the day (each episode = one day) what Rosie was doing at the casino - as we hear now that she may have been a maid (not a juvie hooker). How her family would not have known this is mysterious; and why the cops top brass would go to such lengths to cover up this murder is also mysterious, and my never be satisfactorily answered. Some issues that need clarification at this point in the series: why is Richmond, paralyzed from a shooting and running for mayor, still key to the story? I suspect that he will again become a suspect - there's something suspicious in his refusal to say where he was on the night of the killing. What will Stan Larssen uncover through his posting of a reward for info (the scene when the woman tries to convince him she knew Rosie was excellent)? What about Stan's wife, Mitch, who's basically fled from the family and from the marriage - M has always been suspicious of her, her lack of concern about Rosie's initial disappearance? I think some of the early-on suspects, particularly father of Rosie's boyfriend, will circle back into the story - even Holder, we suspected him at one time - but I don't expect a rapid or clean conclusion, as apparently there is a Season 3 en route. Who dunnit? Coulda been anyone.