Ind. Code § 3-11-11-16

Sec. 16. If a voter shows the voter's ballot or a part of the ballot to another person after the ballot has been marked so as to disclose any of the candidates voted for or how the voter voted on a public question, the ballot may not be deposited in a ballot box. A record of the occurrence shall be made on the poll list, and the voter may not vote again at the election.