Follow the steps here to perform a secure erase that resets the cells and wipes any on-device encryption keys:
https://wiki.archlinux.org/title/Solid_state_drive/Memory_cell_clearing
You can do this from a live-boot environment if you wish. I would very strongly recommend disconnecting ALL other drives before performing this step as the best precaution against accidentally nuking the wrong drive. However if you choose to do this with other drives connected triple check you have the right drive selected before each step.
Sounds like she was groomed by o9a types. Typical modus operandi.
IMO they’re nothing short of a continuation and expansion of the original MKUltra. This time to horrify the public into passing mandatory online ID laws which would be very useful for the agency. That and they create a pre-selected group of amoral sadist monsters the agency can use for various purposes after making contact.
They’re aided by these profit hungry tech corps. Though it’s astonishing and a serious tech literacy problem that the mother let her have a discord account when those are not moderated and not for kids. These tech companies should all go bankrupt but they’ll all have us scanning IDs for everything soon enough instead. Problem is these o9a types have lots of groomers who are underage teens.