How many rounds of ammo he had is not really relevant (unless he used all 26000 rounds of ammo or was in the process of using them).

That he killed the wife in front of the kid… that is relevant.

I recall some recent study that said most mass shooters follow a predictable pattern of buying guns, then amassing guns and ammo.

Nobody needs 26,000 rounds. There is no problem that any American can legitimately solve with 26,000 rounds. It’s a threat to everyone.