Not statutory law rather appears to be court precedent.
According to the case Washington vs IN I believe, once it has been established that you have a LTCH any line of questioning about it or your gun must cease. The LEO cannot take possession of your weapon unless you volunteer it or he has PC or RS.
Quite a pre primary discussion went on there
Location Limits Persons with a license to carry a handgun cannot possess a handgun:
In a commercial or charter aircraft (Ind. Code Ann. § 35-47-6-1);
In an area of an airport where access is controlled by the inspection of persons and property (§ 35-47-6-1.3);
In or on school property (including private schools and preschools; see section 35-41-1-24.7) (§ 35-47-9-2);
In or on property that is being used by a school for a school function or on a school bus (§ 35-47-9-2);
On board a riverboat gambling operation (see 68 Ind. Admin. Code 1-7-1);
On the fairgrounds during the annual state fair (80 Ind. Admin. Code 4-4-4(b); any person properly licensed to carry a firearm must secure the firearm in a locked compartment of his or her vehicle, where it will not be visible, per 80 Ind. Admin. Code 4-4-4(d)); or
In or on port areas or port property (see 130 Ind. Admin. Code 4-1-7 and 4-1-8(2)).
Licensees also cannot carry in children’s homes and child caring institutions run or overseen by Child Welfare Services. See 465 Ind. Admin. Code 2-9-80(b)(3); 465 Ind. Admin. Code 2-10-79(b)(3); 465 Ind. Admin. Code 2-11-80(b)(3); 465 Ind. Admin. Code 2-12-78(b)(3); 465 Ind. Admin. Code 2-13-77(b)(3). In addition, child care centers must prominently post in places regularly viewed by parents prohibitions against the use or possession of firearms, unless such possession is required as a condition of employment. 470 Ind. Admin Code 3-4.7-19(a)(5)(C).
Concealed handgun license holders may be subject to generally applicable possession prohibitions. Please see the Possession Restrictions and Transportation of Firearms subsections above for further information.