Hello. Thank you for coming to JustAnswer. I am Thoreau and I am sending this answer to you only a few minutes after you asked your question. I apologize for the brief delay, but I have been reviewing the pertinent Louisiana statutes to provide you with a complete answer.
I am sorry to hear about the situation with your granddaughter. The issue of whether the boy has committed a crime revolves around the age gap. If there are more than 2 years between her birth date and his birth date, he could potentially be charged with a crime. That said, if he is charged with a crime, it could potentially adversely affect his potential earning capacity in the future, so that's something the parents would want to consider, as he will be liable for child support
and the amount will be affected by his earning capacity. RS 14:81 is the relevant statute and you can read it here: http://law.justia.com/codes/louisiana/2011/rs/title14/rs14-81/. That statute is drafted in a fashion that could include charging a younger person who has been sexually involved with an older person under 17 years old, but I would be surprised if it was applied that way. Other age of consent
laws can be viewed here: http://www.ageofconsent.us/state-laws/louisiana-age-of-consent-laws/.
Again, I'm sorry to hear about your granddaughter's circumstances. Please remember that my job here is to provide accurate information about the law. Providing bad news is the hardest part of doing my job but it's a big part of doing my job well. If you feel that the law is wrong or unfair, I'd strongly encourage you to contact your legislators, as they are the only ones who can change it.