Jenelle Evans: Arrested For Failing Drug Test After Plea Deal, All Smiles in Mug Shot!

Jenelle Evans' latest mug shot is here, after she failed a drug test after her latest court hearing ... in which she struck a plea deal to keep her out of jail.

At least she was in good spirits, apparently:

Jenelle Evans: Arrested For Heroin Possession, Assault on Courtland Rogers

Jenelle Evans of Teen Mom 2 has been arrested for heroin possession - 12 bindles' worth of the stuff - and assault on her husband Courtland Rogers.

Police discovered the small paper packets of drugs on Jenelle's possession when they arrived at her residence following an alleged domestic dispute.

The reality star was also found to be illegally in possession of prescription drug Percocet, along with illegal drug paraphernalia (papers and a pipe).

And then there's the assault charge, which came after Evans allegedly struck her spouse WITH A PIECE OF FURNITURE during a domestic dispute.

Courtland Rogers was arrested, as well, as he is believed to have hit Jenelle Evans on the neck on top of "striking her with a closed fist on her head."