Missing the point. You were/are wrong. If someone dies during the commission of a crime deemed sort of inherently dangerous, such as robbery, then there's sometimes a murder charge, even if the dead person wasn't killed intentionally, or even directly by the perp. This isn't the same as something like this:
(2) Possession of firearm in school zone.
(a) Any individual who knowingly possesses a firearm at a place that the individual knows, or has reasonable cause to believe, is in or on the grounds of a school is guilty of a Class I felony. Any individual who knowingly possesses a firearm at a place that the individual knows, or has reasonable cause to believe, is within 1,000 feet of the grounds of a school is subject to a Class B forfeiture.
Looks like the relevant section. Does seem to require him to have known he had it, which he demonstrated by saying, hey i have a gun in my car? Though even if he didn't know and was told, at that point he would know, and then it would be a felony. lol?
Felony murder still needs the culpability for the underlying crime. Here the weapon possession is the crime. Get it? So it looks like there's automatic liability here once he admits to knowing he had it, or once he knows he has it, on school grounds, even if he didn't know he was in a school beforehand, since he probably had reasonable cause to believe that he was on school grounds.