This picture is the final evidence. Look at the big ugly specimen carrying the cute small one.
It has been reported that it ate the camera man after.
They steal goats, which they eat. Raw.
(see image bottom left)
Yet they like shuffling snow for a candy bar.
(image bottom right)
There's nothing you can do about it. These type of Field Trolls don't like sunlight, but they don't melt or turn to stone. Since they don't wash, they are well protected.
The only remedy is to buy them off with beer (for the big ugly ones) and chocolate (for the small ones)