Two-time state diving champion Maisey O'Donnell was one of the three high school seniors killed in a car crash this week ... a tragedy that took place during their spring break vacation in Florida.
The incident happened on Monday night on Highway 98 near Panama City ... when an SUV carrying O'Donnell and three others crashed with a tractor trailer that was making a U-turn in the median.
The force of the crash sent the SUV over the median .