Still, she seems to be on good terms with her mom who stayed with her dad, and it’s possible that her dad could run into Will and become a participant in the trial without even knowing that Hailey and Will know each other.
Will is the star of Chicago P.D.’s sister series, after all, and this is a pretty meaty storyline for him on Med that I think could span two shows, especially if this would be a case of mini crossovers.
Admittedly, Hailey’s dad was abusive throughout her childhood, to the point that she couldn’t bring herself to visit him while he was in the hospital, so I’m not sure I see her going to extra mile for his health of her own volition.