Good, but I basically figured the entire movie out in the beginning.

Agree... that's what made me uneasy with this movie very early and made the plot quite unbelievable: this guy (Reeves) is dirty enough to coldly murder criminals, disguise the "crime scene" to make it look like it was self-defense and then lie to hide how it really happened, but he is so dumb that he hasn't the slightest clue about what dirty business his partners are doing? I mean, everyone in his team his "in", except him? Come on! And as things happen, everything is so obvious, and this dumb *beep* doesn't understand anything? You just want to slap him to wake him up, from the moment his ex-partner is killed until the end. Of course he is supposed to be blinded by his wife's death and alcohol habit, but everything is as big as a house and he just doesn't see nor understands anything.
A good idea to cast Keanu Reeves for this one, he is probably the only actor who can make all this look more or less plausible, with his constant dumb frowning, like he's trying to remember where he put his car keys and if he has locked his front door before going to work.

That, and some cartoonesque scenes (the money-stuffed wall, the two "criminals-cops"), inept dialogues and badly made action scenes, spoiled the movie for me. It's hard to believe Ellroy wrote the script, it looks like it was then revised and adapted by a 12 years old kid.