I need help, /n/. My aunt's car got scratched on the underside,

I need help, /n/. My aunt's car got scratched on the underside, and everybody's pinning the blame on me.

>aunt bought a pickup to use as transport in the boonies (they have agricultural land there)
>works overseas so she left the care of the car to me
>told me to let anyone use the car when needed, as long as anyone has permission
>only ones that are able to drive it are my two uncles and me
>uncle #1 drives it most of the time, took it to someplace far once but w/ permission
>uncle #2 borrows it sometimes to ferry some things but w/ permission too
>i'm a relatively new driver, but only drove it once around the block to warm it up
>took care to drive on asphalt only and not run on anything more than a curb high
>two weeks later i drove it uncle #1 told me there's a scratch on the underside of the front bumper
>scratch looks like someone ran over a rock or branch then reversed
>a huge entry gash towards the plastic skid plate underneath, then some swirls that then go outwards to the point of entry
>everyone blames me for it
>i have evidence that i didn't do it
>backtrack three weeks ago
>took pictures of the truck to show aunt the vanity plate freshly installed
>present day
>looked at the pictures of the truck to see if something's amiss
>lo and behold
>said scratch visible on a front bumper picture
>never drove the thing before i took the picture
>only uncle #1 drove it before then, uncle #2 only drove it once
>i'm still being blamed
>it's still their word against mine

TL;DR: Aunt's brand-new truck got scratched. I got blamed. I have evidence I didn't do it, still got blamed.

What do I do? Am I fucked?