FF 07 Creature Discomforts

A lone sniper killed Grant Burnside, the leader of a violent gang in May 2014.
Four years on, Gus Freeman and his team review a case that refused to give up any answers.
Why does every stone they turn over lead to the solving of unrelated crimes?
The Burnside family pride itself on being impregnable. Nobody speaks out against them and lives.
Gus keeps digging away at the foundations until the fortress topples like a house of cards.
But will Gus find Grant Burnside’s killer?