Crocket, my condolences to you and the families of the victims.
The Vne/Mmo is known as the "red line" speed or the "never exceed" speed. If exceeded, the aircraft could experience structural failure. The Vne\Mmo for the 737 is about 80% of the speed of sound (at 33,000 ft). Given this, I doubt whether the aircraft could have been flown at 1.2 times the speed of sound without breaking up. Well, then again, I'm no expert.
I do remember reading of eye-witness accounts that two explosions were heard before the impact. Some experts suggested that this may have been the aircraft breaking the sound barrier on its descent.
Good luck with the court case.