2004 Nissan Titan body & structure problems

Tl*the contact owns a 2004 nissan titan. While driving 5 MPH, the contact attempted to apply the brakes, but the vehicle would not stop. The contact almost struck two pedestrians. She had to apply the emergency brake in order to stop the vehicle. The dealer stated that the ABS caused the failure. The powertrain was unknown. The current and failure mileages were 79,000.

I've been having problems with a leak in the roof. I always noticed a damp musty smell after it rained but never found anything other than rear sliding window was damp until after a heavy rain I made a sharp left and caught out of the corner of my eye water flying out of the sliding window track. I've tried looking to see where it was coming from but can't find the exact location. Let me point out I never use the rear window.