I was just going to say that going by the name her sire must be a sable and there is a sable dog in the foreground of the photo with the liver and tan one. I'm not 100% 'up' on sable colour inheritance as it doesn't really occur in working Cockers, but I would think that her sire is actually the sable dog as it really can't be the liver and tan one (IF her dam is a liver tricolour as you've said!). I *think* the dog would be either Bbe
he
h or BBe
he
h to appear as sable so could then pass on the black B gene (or it could be BB/Bb and then A/a something depending on where they think the sable gene appears!). I could be wrong on that though as I don't know a huge amount about the sable pattern.
However you said that her mother is a liver tricolour and that's what appears to be in the photo, although it's not all that clear, so it's odd that she's coming up as a black tri when you Google her
What colour was she when you saw her?? If the dam is a black tri then the father could still be the liver and tan dog. That's all very confusing!