My tablet was stolen out of a Walmart Parking Lot from my vhiechle, is there a way Walmart can help me find the criminal?

In the last question you claimed it was stolen at Macdonalds. You need to get your facts right. Anyway, you can always ask to see any recording they have. They may not agree. Presuming you have reported the theft to the police, they may well show the recording to them.

The Police can get security tapes.
Leaving any expensive electronics in your car is stupid.

First you say it was stolen at MaCdonalds, now you say it was stolen from your car in a Walmart parking lot,something is going on here, it looks like you may be trolling. They probably won't show you the footage, but if you get the police involved they may be forced to show them the footage.

They might have video, but they are not obligated to show footage without a warrant (and probably won't). This should be reported to the police.

BS. Unless you actually WITNESSED the theft, you CAN'T know the EXACT time of the theft.l If you did, you
ALREADY have a better EYE WITNESS description of the thief than any video may have. The parking lot cameras simply don't have the resolution to come close to your eyes.

Ask them to check their CCTV tapes.