Is Alicia channeling Kirei here?
If so, I'm truly afraid she has encountered Caren... or her father.
Project F. datas. Jail has worked with Precia, so he know or has access to equipment of the Project F, and with his 'hidden' connections with the TSAB can use them to 'acuire' a copy of Shirou's memories.
Imcomplete, fragmented and/or corrupted, but he can.
So... Clone!Shirou will have many, many mental problems...