Stolen money

My dad had a table at the LeMars, Ia gun show last weekend (April 11). At the end of show,  as he was loading up his pickup,  someone  took his cash box which had $4,825 cash inside it. He made a report to the LeMars Police Department, and it is currently under investigation. He was selling part of his gun collection to provide for my mother. It's heartbreaking to me that someone would take money from my dad,  who has a very soft heart and would give the shirt off his back to help someone in need.  Thank you for any support,  either monetary or prayers.