So last Saturday My son and I took Buttercup(C22) out for a wonderful day of sailing on a local lake here in MN. Wednesday morning I got a call from the DNR informing me that my boat sank. While on the shore there was a young woman showing her friends a post from Instagram of a young man standing on the sunken boat. I asked to see the pic and I took a pic of her phone (see below). After a days trying to raise her ourselves with min success, we ended up calling in the pros(lucky I have friends that dive and work in the recovery business) to lift her and bring her in. Now comes My question. There are no viable holes or cracks. So I have narrowed to two things. One someone vandalize her, because the three hatch panels are gone and the top one was latch after we finished sailing her. Two something happened with the center board cable tube. This is an old boat 1974 and is new to us. Anyone have any thoughts or ideas where I should look for clues?