Yes. Also, I have to think if I was trapped outside of a house and was freezing, I would break a window to get in before I let myself die.
Exactly. Plus, the fence wasn't that high. Even if one guy couldn't get out, he could assist at least one other in getting out, and that person goes for help of some kind. Was the guy on the back porch banging at it but person inside was asleep/passed out? Would three grown men, familiar with cold weather, wait until they were starting to feel effects of cold and not attempt to get out of the backyard? That reads like an unbelievable novel, when I think about it.
When the girlfriend arrives,
she takes off a screen and breaks a window to get in (she's approaching from the front, but is able to get into the basement, and from there, into the rest of the house). Surely there's at least one basement window at the back? No windows at all at the back?
If that's the case, one man kneels and gives a boost to the most athletic other guy to get him over the fence (from where he could have, if he chose, done the same thing as the girlfriend did - or get to a neighbor's house and ask them to call 911 or assist with a ladder in helping anyone still in the backyard.
It's possible, though, that they were drinking and at least two of them passed out. Upon realizing this (and having no aid from his passed out friends), third man tries to bang on back door, but is dangerously close to passing out himself, which he does. Alcohol is not a respecter of human life, in this situation. By that time, the other two men are on the ground and getting hypothermic. Their bodies would have gradually approached internal temperatures at which human survival is unlikely, then impossible.
Internal body temperatures below 68F are profoundly life-threatening. Even at Stage Two hypothermia, shivering ceases and the person is merely drowsy. Combined with alcohol, that can be a deadly scenario.
en.wikipedia.org
So if they went outside, shivering at first, but stayed or sat in lawn chairs or something, they'd gradually get colder, but maybe stop realizing it. Drowsy from cold and drowsy from alcohol, both. Not a good combination. And probably not what the family wants to hear, but after reading all the posts on this thread (especially from people who live in the area), it does seem plausible.
IMO.