Wife's prius died..

Wife's prius died in an intersection downtown. Wouldn't start. Nothing but those funny prepping noises when start button pushed. No dash lights except red flashing key which disappears when fob inserted in slot. Still won't start, no dash lights come on. MFD blank. No diagnostic mode. Headlights shine bright, flashers work. Had it towed home. Would not go into neutral so tow driver dragged it onto flatbed with front wheels sliding.
Aux battery clean and tight. Despite 160000 miles, car in good shape with two year old aux battery. Initially reading 12.1 v, went to 12.7 after charging overnight. Still no action when attempting to start, even with charger on. Tried jumping at fuse box, still no dash lights, no start. Read about combination meter problems but dealer service manager says he doesn't think thats it. I tore out the dash but now I'm stumped and too stubborn (cheap) to tow it to dealer. Any help? Ideas?

 

Thanks for the replies. Yes I disconnected the battery and did battery reset. My wife swears it has plenty of gas and she is familiar with how that looks from past experience. I did try both keys and checked all the fuses in the engine fuse box for continuity. I will check to see which ones have power tomorrow. No rodent signs. I'm not sure where the am2 fuse is but I will google it. Now I'm afraid the dealer will find a way to charge me a bundle to reinstall the dash if I tow it in. Not giving up yet!

 

Also, dealer said there are two recalls, something about the steering column and the inverter water pump.

 

Thanks JC91006. Good advice on that recall. I will still take a look at that am2 fuse before calling the tow truck. I'm going to request a dolly for the front wheels since I still can't get it into neutral. Thanks everyone.