Cremation

My best.. beautiful friend died in my arms a few years back. She was living with me and my husband during a divorce to a real weirdo., pathological lying cheater.. we were kayaking and she drowned. I swam her body back to shore for like an hour.. then ran for hours to find help..She was still married to him.. So he had full control over her funeral. He had her cremated and gave her ashes to her daughters her son and me. He was so jealous that she was living with me and my husband he told her kids that we stole her from him and that we were sleeping with her which was not true. But the hard part is I'm not sure the Ashes are hers... he brought them to me in a pill bottle and said he had separated them and given us each some. and gave a little bit to each family member but they looked like crushed oyster shells to me. I did a Google search on an image of my friends remains and GOOGLE said it was oyster shells.. this mother fucker🤯 . Gave us and her kids BS ashes AND I am pretty sure he took every dime of her life insurance.. ANYWAY where can I send these "remains" to find out if they are my best girls remains.. I don't give a fuck if it is years later.. I will ruin this man. He hurt her so bad.. help reddit fam.. I am asking the ladies.. because that's who is usually doing the funeral stuff