daniel lurie and san francisco needs a mayor unafraid to take on the status quo, bring accountability, and stop the excuses. >>> so, as she worked her job at caesars palace and looked after kelsey turner'spolice, a traumatic night she's talking about in detail for the first time only to "20/20." why did you want to share your story with us today? >> i just wanted to tell the truth. i get to say my piece and have a little bit of closure and maybe also other people might have a little closure, too. >> it was late on saturday night, march 2nd, when diana finished her shift at the colosseum and asked her roommate for a ride home. she got the ride, all right. but when thomas burchard got lost and passed his phone to kelsey so she could use the gps, all hell broke loose on i-15. >> she started going through his phone, and she saw some stuff that she didn't like. messages between her mom and dr. burchard. >> why do you think it upset kelsey so much? >> kelsey said that they were talking about maybe taking her children. she started hitting him, kind of getting a little crazy. they were hitting each other pretty bad. >> so they're going 60 miles an hour and they're fighting? >> yes. >> a screami