Hi Point carbines are not expensive.
True; I was looking at their product line just this morning. However the alleged shooter was on probation for receiving stolen property, and I don't think he'd be able to officially buy the firearm recently with this kind of criminal background; and before that he'd be too young (<18.) It would also require specific use in mind - and he now insists that he had none. Gangbangers have not much need of long guns, as they are not concealable. Unfortunately, the linked article does not explain what weapon was recovered; they just say that it matches the ejected cases.