Excellent question. It's answered in an interview. Basically, he doesn't have the smoking gun. Here's my Reader Digest version based on what I could find. True the Vote (allegedly) gets a whistle blower calling them about this ballot box scam. Unfortunately, the whistle blower won't come forth, so he could be a GOP plant, a fictitious character or the real deal.
True the Vote then acquires geolocations of cell phones in areas of question and isolates cell phones that were in the area of 10+ ballot boxes. However, this is where it gets a little "grey" if you will. True the Vote used a 100 ft geofence and the geolocating was only accurate to within 30 feet, so I think what we really have is not people visiting 10+ ballot boxes but people that were within 130ft of 10+ ballot boxes. Being within 130 feet of 10+ ballot boxes is certainly a red flag and worth looking into.
However, that brings up some more issues. The majority of the boxes were at libraries, so could this be people who work for the library system, maybe a delivery guy who delivers to the libraries, etc. Could have been the guy in charge of picking up the ballots. I doubt that would account for 2000 people, but I wouldn't be surprised if it accounted for big chunk of that 2000; maybe there were mules, but only 1000 of them.
So this is where the video surveillance comes in. They have videos of individuals dropping off ballot(s) at a ballot box that they claim time corresponds to the geolocation of a mule. However, the alleged mule could be 130 feet away. As far as I can tell True the Vote hasn't released the geolocation data they have, although they've shared it with local authorities who've declined to follow-up.
So that's a considerable amount of "fishiness" for sure. But what I also find pretty fishy is that we have 2000 (alleged) mules at 10+ ballot boxes, but a not single one of them is caught on camera a second time. The other thing that strikes me as fishy is it's a huge operation to harvest the hundreds of thousands maybe ~million ballots to pull this off. Plus all the forgers you would need. So hundreds of thousands of people have kept quiet about this operation; that strikes me as highly unlikely. Furthermore, the checks and balances they have in place are good at filtering out multiple votes, dead voters, etc. So even if you crammed 1m fake votes into the system how many would actually end up getting toward Biden? And who is to say that some of these alleged mules weren't GOP operatives either attempting to sow distrust or stuffing the ballot box for Trump?
Here's where I distilled most of the information from. It's a Wash Post interview with D'Souza. Earlier I cited a D'Souza/Carlson interview, but there seems to be some rift between the two and I'm not sure if that interview actually ever took place, so I might have been the victim of biased liberal news reporting or maybe I just scrambled some stuff in my mind.
