A southern Idaho representative is frustrated his son was cited for illegally carrying a concealed dangerous weapon without a permit — because he had a 4-inch knife under his car seat.

Republican Rep. Pete Nielsen of Mountain Home said Thursday his son ended up paying $300 to remedy the situation after the traffic stop.

As a result, Nielsen aims to change Idaho's concealed weapon law, so it no longer applies to knives with blades 4 inches or less.

Nielsen said he's got the approval of Idaho police on his measure.

He actually wanted to allow longer knives be concealed without a permit.

But law enforcement agents told him 4 inches was their limit.

Nielsen is still working on his bill, after an initial hearing in the House State Affairs Committee.