It's disarmingly short, because you've included a lot of material after the story itself. So, because the end came for me on page 16 out of 27, it seemed like a bit of an anticlimax, because I was expecting these characters to get developed more.
But in general, this is competent: it kept me moving through it. There are too many loose ends, however, to give it the fifth star.
One problem is his bloody clothes: you repeatedly mention that he's covered in blood (as is Leah) but they sit in the hospital waiting room, with other people, for some length of time like that. Nobody's going to stand around in wet, bloody clothes, and they certainly won't sit on chairs. This can be fairly easily rectified: the cops can show up right away, or the hospital people can insist they change and put on scrubs or whatever.
A more problematic issue is the lack of characterization of Daniel. His reactions are all over the place and his motivations unclear. He seems awfully sad about his wife's death for someone who killed her. And why did he kill her? Why not just leave her for the other woman, if all Kristine does is criticize him? If there's some other reason to kill her (e.g., insurance money), then adding that might help explain things. There's nothing except "he's a douche" to explain his murdering his wife. And yes, he may be a douche, but the story will be stronger if you can make it clearer how and especially why he's one.
(review of free book)