The video below shows a casting video for a new character “Brigette”. This character will portray a “hot microbiologist” on season 7. SPOILERS don’t peek unless you wan’t spoiling. (no news as to who will play this role yet)
From the dialogue it sounds like the “Chuck” person killed a vampire the night before. Also you can hear the name Willa. Willa states that she used to know Chuck (when she was still human).