FBI Demon

This unnamed demon infiltrated the FBI in an effort to get at the Winchesters.

Powers and Abilities
This demon appeared to be a regular low-level demon with the powers of one.
 * Demonic Possession - As a demon, he needed a vessel to walk the Earth.
 * Immortality - As a demon, he would never age or die unless killed.
 * Invulnerability - As a demon, he was invulnerable to normal methods of harm.
 * Super Strength - As a demon, he was stronger than most average humans. However, the Winchesters together overpowered him, indicating that the demon is weak enough to be overpowered by two stronger than average humans.

Weaknesses
As a regular low-level demon, he possessed all the weaknesses of one.
 * Holy Water - Like all low-level demons, he was vulnerable to holy water.
 * Exorcism - Like all low-level demons, he was vulnerable to exorcisms. Being subjected to one caused him great pain.

Appearances

 * Season 3
 * Jus In Bello