This has happened to me a number of times. Not all vampyre are able to extract information, view memories, or erase memories. It had been in the realm of the borne and so some resorted to spells or waters like those of the Leith. The borne do not typically erase memories except for children and when the retention of the memories prevents the safe continuation of life. There have been hybrids and clones who have studied Psy-Ops. mind control, and psychic ability. They do tend to have some ability to master these elements but to varying degrees.
Humans have also tortured the kindred with bio-engineering (chips), brain injuries, brain implantation, and hypnosis.