I don't think JL was the fall guy. WA was simply trying to introduce another potential suspect to muddy the waters. Murder trials are problematic for the person on trial when they are the only potential suspect hence the reason Fulford is pointing the finger at WA. Not because she or her client want WA to go to prison, simply to show the jury that sure Donna might have done it, but so could have Wendi?
Why did WA tell JL about CA hiring a hitman? A question many of us have puzzled over. "Who in their right mind would tell someone about a murder plot they were involved in?"
The emphasis is on "right mind." WA was on a number of prescription drugs at the time, including anti-psychotic medication. These were prescribed by HA who is a dentist not a psychiatrist. Plus she was drinking heavily. JL confirmed their date did not go ahead because she was intoxicated due to alcohol and "other stuff." She was probably under a massive amount of stress, due in court, potential loss of law license as well as close to $300k, another loss to Dan and she had a murder to plan...
So suffice to say this was not a person who had right of mind... maybe she told JL because in her disorded stated she believed he'd transfer from meek-mild mannered professor to gun for hire and go kill Dan for her...