This is a case you can work through at your own pace. Chief hasn’t given any deadlines so if you need to set your notes down for a while and come back to it that’s perfectly fine. Just make sure you are actually keeping notes, wouldn’t want you to have to go all the way back to the beginning. I mean you can, nothing’s stopping you, but that’s not really detective work is it? Anyway, you stick at it long enough and you’ll find the whole thing will probably take you two-three hours, maybe a little less if you’re a seasoned detective.