Sorry, Mr. 1 Post, if I scared you. Like I said, the End-user has the burden to prove it was not illegal. More simply put, his defense in this criminal matter must hinge on the knife being legal. The State has the burden of proof to determine the knife is illegal. It's not a hard concept.
So, this Officer should not have arrested this person? Discretion is a huge part of Law Enforcement, and it is not known how much discretion this Officer and Agency possess.
For example, if this occcured in California, I'd need a citizen's arrest from the Security person to arrest the knife's owner, who left the knife w/Security. This is because a Police Officer in Cali. cannot make a misdemeanor arrest without witnessing it (a switchblade in Cali. is a misdemeanor). I wouldn't accept the arrest from the Security person, because I believe the knife doesn't fall under the Switchblade provision (though it's VERY close). Does the Officer in the original post have the same latitude? Seems like he does not.
Here's California's Switchblade Law, how would you interpret it in relation to the original post:
"653k. Every person who possesses in the passenger's or driver's
area of any motor vehicle in any public place or place open to the
public, carries upon his or her person, and every person who sells,
offers for sale, exposes for sale, loans, transfers, or gives to any
other person a switchblade knife having a blade two or more inches in
length is guilty of a misdemeanor.
For the purposes of this section, "switchblade knife" means a
knife having the appearance of a pocketknife and includes a
spring-blade knife, snap-blade knife, gravity knife or any other
similar type knife, the blade or blades of which are two or more
inches in length and which can be released automatically by a flick
of a button, pressure on the handle, flip of the wrist or other
mechanical device, or is released by the weight of the blade or by
any type of mechanism whatsoever. "Switchblade knife" does not
include a knife that opens with one hand utilizing thumb pressure
applied solely to the blade of the knife or a thumb stud attached to
the blade, provided that the knife has a detent or other mechanism
that provides resistance that must be overcome in opening the blade,
or that biases the blade back toward its closed position."
Here's the Illinois Statute:
(720 ILCS 5/24‑1) (from Ch. 38, par. 24‑1)
Sec. 24‑1. Unlawful Use of Weapons.
(a) A person commits the offense of unlawful use of weapons when he knowingly:
(1) Sells, manufactures, purchases, possesses or
carries any bludgeon, black‑jack, slung‑shot, sand‑club, sand‑bag, metal knuckles, throwing star, or any knife,commonly referred to as a switchblade knife, which has a blade that opens automatically by hand pressure applied to a button, spring or other device in the handle of the knife , or a ballistic knife, which is a device that propels a knifelike blade as a projectile by means of a coil spring, elastic material or compressed gas;"
A Chive works off a spring (more of a leaf spring) in the handle, which is opened by hand pressure applied to the "flipper" on the back of the blade.
Upon reading that, seems most of these assisted openers are illegal. It's going to take several cases to figure these out.
--dan