Carmen in Cambria bar gives you this series of quests.
#1 Slay $5000
Can be found at the top of the map when you enter the Roadblock on the Southern most road South of Estoni, East of Meduma Airport. He is near a building, talk to him and he becomes hostile and can be killed.
#2 Mother of Mayhem $10000
You can find he hanging out in the pit in the Grumm Industrial Sector. Careful as she carries an M79 with rockets.
#3 ???? $
#4 ???? $
third quest, the guy is in alma, small house south of the gas station
4th quest, guy is in estoni
i already settled 4 bounty. the 5th ones is quite troublesome as the only hint is he's hangs out at a bar. i've tried searching at San Mona's bar but he's not there.
just found him, he's in san mona. near the place with all the girls in rooms
yup i just found him at san mona's bar.. the one near kingpin villa..
6th bounty is in meduna and i'm not there yet..