Well that was a short update. Matou pretty much covered it. Person in custody in relation to the murder. Car found in a parking garage, body found in car, area of the car not specified. A more informative update will be provided tomorrow, after the individual has been before the courts. We will then know the suspect's identity, and the charges laid.
Personally, I'm wondering if there is another suspect involved. I know the little one is just a toddler, but if she really did say "Daddy took me to the store, and when we got back Mommy was gone" then who moved the body? Would he really risk leaving the the car in any ol' civilian's parking spot? Who lives in that building? Who's spot is it? I could be way off-base, but my intuition went there.
Also, I think she may have been found in the trunk. Earlier photos from when the vehicle was first located, don't show a person in the car. Then the next update was her body was found.
ETA: After seeing the above photo of the car, I'm confident to say she was likely found in the trunk.