I thought Pat spotted Jill at the ranch at the time of the 'accident' and told everyone (including Karen when she returned to the city) her theory that Jill cut the strap. I could be remembering that wrong, I suppose. Mack and Karen were kind of preoccupied with their own family drama. I thought Mack found out about Julie's fall the next morning when they found Gary sleeping in his car outside the cul-de-sac. Gary said he feared for Val's safety after what happened at the ranch with Jill. I genuinely thought Mack was part of the group that found him. Hmmm, that's what I get for trying to rely on my grainy memory.