That is terrible. 😠 I am so sorry this happened to your sweet mother.

When you contact @steemcleaners, perhaps ask them if there is a way they can look at the IP address of the user who accessed the account and made the transfer to Blocktrades. If so, they might be able to do a query of what other accounts have used that same IP address to access the blockchain and track-down who did it. It can't hurt to ask.