Well it's certainly reasonable, considering WH's (former) employment in heating and air. The only thing is, I can't tell by the images I've seen if the entire bottom half of the card has a clean, straight cut. If it does, it likely wasn't snips since the blade on that tool is shorter than the width of the card, and it would take 2 cuts to go all the way through (as opposed to household scissor blades that are longer than a bank card, and could easily cut through in a single effort). That being said, IF WH is the one who cut that card, it's reasonable to assume he also had a pair of heavy duty shears in his tool box as well for cutting longer items. That would certainly do the trick in a single cut.
moo.
ETA: lol, shears... like shown here http://cre8tor.hubpages.com/hub/Cho...ls-for-Getting-Started-In-Heating-and-Cooling
LE has the card. Chance are though, if he is the one who cut of the card to help cover his tracks and distance the timeline, then if he used snips it would be obvious and implicate him, so that chances of his using a set of strong steel scissors may be better. He would want to keep suspicion away which seems to have been the whole effort of his activities since 7 am. I have a very hard time with the lack of any other information to think anything else could have happened. I hope we get some indication from LE on whether AJ's mom and others are cooperating on his timeline. If he's innocent nothing is lost, if he isn't it is the only way to find AJ, it seems.