Regarding the end - Jail or suicide or walk away?
Spoilers alert.
The way the movie went i honestly thought that given everything that had happened, he should maybe have considered suicide, by the time he is digging the grave for that girl he had shot:
-His fingerprints are on the gun which his friend killed himself with (jeffrey)
-He killed the bad guy with his gun, even if the girl would have provided support/cover in court, it wasnt exactly self defense or what is the law about this?
-In the motel or what ever it was, he asked for the keys and paid money so obviously he could have been accused of that other guy death as well
Basically, the movie was set for a suicide in the end, i didnt understand when he rushed to dig the grave, to not bring a gun, his gun is still in the ground where the girl is, he didnt bring the shotgun/riffle with him when went to dig the grave.