Even though I see a person or two in the back, I suspect that LE used higher resolution software to determine that it's equipment since that's what LE announced at the conference.
The other possibility is that it really is Lauren in the back, but LE is hiding that fact in the hopes that a friend of the white truck owner will call in and say "yeah, that truck belongs to my friend so and so...," not realizing that he/she is giving away the abductor.
I have a feeling the former is the truth, even though I wish it was the latter. Realistically, if you're going to grab someone from the street, I'd think you would put her in the crew cab part of the truck, not in the bed where she might scream or jump out. Of course, we can always hope the culprit wasn't thinking smart.