I heard that interview and he also said that the particular rifle was illegal in Illinois! That would only be true if the weapon was fully automatic or a 3 round burst.
Illinois may have a lot of issues but you can still legally own a semi-auto rifle, at least everywhere but Chicago. In fact there are at least 2 excellent companies here that make great rifles, DSA for the FAL and Springfield Armory for the M1A and now the AR-15.
Yeah, the doc wasn’t much more help. And they pontificate lie they are authorities.