Radio/tape Cd Player problems of the 2014 Kia Motor Optima

Car stops, losing all power and function without warning while you're driving it. At the time this happened, the car was in motion, but moving slowly to a stop on a city street. After several attempts to restart, it did and I brought it to kia dealer. I bought the used car 60 days ago. It had been in an accident but seemed fine. From a dealer. I am terrified to drive it any more, because this could cause a fatal collision. Took it to dealer and they cannot find anything wrong. Other issues that happened just before this happened: just 5-10 minutes before this happened, I'd inserted a phone charger into the usb port and the radio went out, but a minute or so later, started working again. In the prior two week period, the car did not respond to sta rting, no sound, no anything. Then on the repeat attempt to start it, it did. I cannot drive this car now, particularly since I typically have passengers whose lives are also risk.

Vehicle was in motion and stalled during a drive and was unable to start. Interior lights and dashboard turned on along with radio and windows but battery was damaged. After getting the vehicle inspected from an auto shop, it was evident that there was engine failure. This occurred while turning into a parking lot from a main street.