Sorry you had a bad 'un.
When I enquired of her last year, she confirmed that she did not provide DFK nor OWO, so was never placed in my HL.
A quick enquiry is all it takes, even if she is one of the only few available. It's not easy, but try not to let your wrong brain decide for you.
Also, research, research and more research is vital, if only to avoid the red negative ones.