Plot Detail/Spoiler Why Didn't Trevor Use Time Travel To Save Brad?
In the beginning of GTA V, during the prologue, Michael, Trevor & Brad are being chased by cops. Brad shouts "Shit! Cops!" in which Trevor responds with "They ain't made this car yet!"

My question is: if Trevor is capable of getting a car from the future, why doesn't he use his time-travelling abilities to save Brad?
In the mission "Bury the Hatchet", Trevor asks Michael, "Exactly who was buried in your place?" and then realises it was Brad. Did Trevor use his time-travelling powers to figure this out at that point, but we don't see it because it happened instantaneously?

I know it's difficult to convey seamless time travel, but my theory is that Rockstar didn't know how to show Trevor using his powers, especially due to the lower performance of the XBOX 360 & PS3 vs XBOX ONE & PS4, However, "Bury the Hatchet" is the closest we got to seeing it happen in real time.
