I must be missing something here, I haven't found anything about this relationship that is illegal. It's cozy, perhaps not the best way to go about things, but there's nothing in here of what they are doing that is in any way illegal. It doesn't even break regulations. I get that maybe the reporter is trying to draw a parallel between private corporations working with police departments, but I'm not seeing a problem.
A billionaire is creating the impression his portfolio companies are building successful relationships in the market by providing funds to the police with which to “buy” said products.
Evidence shows they have no input on the purchases and are entirely guided by Horowitz.
In addition he is funding other police requests in return for an unspecified level of special treatment and access.
What if this doesn’t strike you as rampant corruption?