Fresh Cadavers

Everybody has a different tolerance for what is acceptable to give away without a spoiler warning, so this will err on the side of caution and hide just about everything.

Requirements
??

Tasks
Kill a gang leader in Somerset (10-day time limit)
?

Rewards
Stage 1 -- $7500
Stage 2 -- ?
Stage 3 -- ?
Stage 4 -- ?
Stage 5 -- ?