Far too many people here (and elsewhere) tend to think of Americans as being either Republican or Democrat. That's demonstrably incorrect.

The actual demographic breakdown is very different. Using 2024 data, of the c.340 million Americans, about 187 million are registered to vote (and therefore capable of having a party affiliation). Of that number, a bit less than half are registered to any political party. There are approximately 36 million registered Republicans and 45 million registered Democrats, with the remaining party-affiliated voters distributed among minor parties.* Those criminals are thus statistically more likely to be unaffiliated.

Moreover, people convicted of crimes have a high probability of being repeat offenders, with a fairly high number being convicted felons and thus unable to register to vote. This makes the people cited in the OP even less likely to be Democrats (or Republicans).

* with the caveat that some states don't have affiliation data

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Honestly, giving matters like this even a moment's actual reasoned consideration would prevent this sort of useless claim from being posted (save for obvious trolling purposes).