Once this conversation is over, Sevilla leaves with his clothes (she hands them over to Horatio with, "The blood's starting to smell") and tells Horatio, "He says his wife called him at the office and he came home." Horatio wants to know why. Sevilla tells him, "She was upset. Baby wouldn't stop crying. U-turns from office to home were not unusual." The two of them having established that Stephanie had her hands full and was prevailing upon the person who had contributed a little something to this situation, they begin pondering Jason's wounding in the course of events. After dismissing the possibility that he shot himself in the back with a rifle, Horatio decrees, "Hormonal depression and long arms could get us there."
It's Megan! She's still holding the swab and writing as Delko comes in. She asks, "What you got?" "A year-long gig!" he replies. Actually, he has some long, dark hairs collected from the master bedroom where blonde Stephanie slept. Well, we know what Megan's doing when she's off-camera -- testing the hair.
And now, it's Calleigh's turn to get her very own Science Montage, where she's doing assorted things to the rifle that will be neither explained nor rendered particularly relevant later, so let's move on to Speedle, who's got the gory version of those mail-order home decorator kits where you can draw up the floor plan and stencil in furniture. Speedle's version has different corpse positions and rifle stencils, and even after painstakingly tracing everything in, he's taken the time to go back and fill in little red-ink pools of blood. Horatio pops by eventually to ask how Speedle's little masterpiece is going, and he replies, "Marking evidence as it rolls in." Delko pops in just then, saying, "Megan ran the hairs from the master bed!" We learn that the mystery shedder isn't Stephanie, but a female relative of hers. Speedle says, "The sister was so broken up." What sister? Whose sister? Why is this the first we've heard of her existence, much less her reaction to the news? Has the sister been talking to Megan? Would that explain it? In any event, Horatio immediately infers the worst and says, "Maybe Mom had more than hormones and kids to worry about, huh?"