Scott Lawrence, a 41-year old Casper resident died at the scene when his 2002 Ford Explorer overturned on I25 south of Kaycee.
20-year old Oddyesa Lawrence was transported by helicopter to Wyoming Medical Center.
Cell phone use is being investigated as a contributing factor
Later that same day, a 62-year old Montana resident died of injuries when her 2012 Chevy Equinox overturned on I25 south of Buffalo.
Evelyn Parker was transported to the Johnson County Healthcare Center and later died of her injuries.
A 7-year old passenger was transported to Denver for injuries sustained in the crash.
The deaths were the 36th and 37th fatalities on Wyoming roadways this year.