A 16 year old Tiffen girl was killed, and two other teens were hospitalized after a rollover accident on I-380, near North Liberty last night. The Iowa State Patrol Says Alyssa Benedict was a passenger in the van, and that she was not wearing her seatbelt. Another passenger, 16 year old Rachel Petersen of Tiffen, and the driver 15 year old Rachel Stewart of North Liberty were taken to the University of Iowa Hospital. Police say Stewart lost control when the van entered the median and overturned, coming to rest on its top. They say the accident remains under investigation.