While I can't go into too many details because of ongoing investigation, I was involved in a 20-F (fatal car wreck) recently in New Orleans.
Short version: a driver failed to yield at a stop sign, literally right in front of me. I'm fine, but no one in the other car was belted in; and one of them died as a result despite the relatively low speed of the collision. The investigator at the scene told me,"Mr. XD-GEM, don't beat yourself up over this. You weren't at fault, and if they'd have worn their seatbelt, they would have walked away from this."
I can't tell you how many times I've rolled up on similar scenes where a seemingly insignificant collision resulted in no injury to those in belts and death to those unbuckled.
Short version: a driver failed to yield at a stop sign, literally right in front of me. I'm fine, but no one in the other car was belted in; and one of them died as a result despite the relatively low speed of the collision. The investigator at the scene told me,"Mr. XD-GEM, don't beat yourself up over this. You weren't at fault, and if they'd have worn their seatbelt, they would have walked away from this."
I can't tell you how many times I've rolled up on similar scenes where a seemingly insignificant collision resulted in no injury to those in belts and death to those unbuckled.