You can find Indiana mug shots at Mugshots.com, a site that acts as a database for Official Law Enforcement records. The page for Indiana lists the counties and number of mug shots available for viewing in each category.
After clicking on the specific county within Indiana, visitors see a page with thumbnails of the mug shots of those arrested in that area. Each thumbnail leads to a page of the specific details of the person's arrest.
Mugshots.com only shows mug shots of individuals arrested by agencies that release them, so you may not be able to find all mug shots taken in the United States. The presence of mug shots on the Indiana page also does not mean that the suspect was proven guilty, as all are still assumed innocent before a trial.