Will follow polymarket, their rules are:

This market will resolve to "Yes" if Hunter Biden, son of US President Joseph Biden, is indicted on federal charges or otherwise formally charged with any federal crime by the United States of America between March 20, 2023 and July 1, 2023, 11:59:59 PM ET. Otherwise, this market will resolve to "No".

The primary resolution source for this market will be official information from the federal government of the United States (from sources such as https://www.fbi.gov/news/pressrel, https://www.justice.gov/news), however credible reporting may be used.