[Ema's problem is that she's great at the science and the observation aspects of investigation; it's the drawing conclusions part of the job that she occasionally falls short in. And, honestly, he's given her no reason not to trust him; he's been a great ally and occasionally a friend. He's a little full of himself and the riddles frustrate her to no end, but no one's perfect. And really, there's no denying his brilliance.

In other words, she doesn't see what's coming at all.

After the map's drawn, she circles a room.] This is Lucy's room. I'll start here. If I have time... [She draws an arrow from Lucy's room to the master bedroom.] I'll move to here. Investigating Billy and Jane would be worthless; as far as I know, they're just regular drones. The father, I'm not so sure... especially since he changed, recently. So I'll look into him if I have time.

I'm going to wear gloves--I took some from the hospital where I work.

[Mostly, she's just thinking out loud, going over everything. If Eddie has feedback, he's free to interject.]