I don't believe it. I hope it's not too late but please send my condolences to his wife and family. For some reason, I wasn't getting any notifications that this thread was getting replies.
I think if it was the master cylinder, it would affect all and not just one but I could be wrong about that. See if you can diconnect the brake line from the caliper and have someone press the brake and watch the flow of the fluid. You can follow the brake line under the car to the abs modulator. They're all close to each other underneath the car you can't miss it. Hopefully one of em isn't bent.
Sorry to hear about your misfortune man. Glad you're ok and it could've been worst....like colliding into a pole, another vehicle, or deer going straight through the car.
Lol...miss ya'll too man. Baby doing good...she's getting big and wants to run all over the place. She's starting to take steps and I can hardly keep up with her.