Three Bounty Hunters can be randomly encountered in the wilderness after they track you down to kill you by order of the jarl from a hold where you have accumulated a bounty of 1000 gold or higher. Their inventories are fully levelled.
All three Bounty Hunters will attack you at once. There is no way to pay them, as they will try to kill you without hesitation.
A bounty hunter attacking
This bounty hunter tends to wear heavy armor and fights with a one-handed weapon and shield. They will also carry the bounty note for you.
A bounty hunter aiming with his bow
This bounty hunter tends to wear light armor and fights with a bow.
A bounty hunter using the Lightning Bolt spell
This bounty hunter tends to wear clothes and fights using spells.