4 ideas
His faith made him the church's public face and a draw for money and followers. He is found brutally mutilated in the church, and the investigation leads away from his vulnerable sister toward the pastors who had built their power and finances on his holy image.
In a charismatic congregation, pastors who claim to speak for God make questioning their decisions feel like questioning God. That lets them control money, relationships and reputations without scrutiny. Members who break ranks are shunned rather than answered, so the community punishes dissent on the leaders' behalf.
Someone who fled a closed community and comes back can read it as both insider and outsider. They know its codes and weak points, but also carry the shame of how they left, and the community still uses that shame against them. The knowledge that makes them useful is the same history that makes them vulnerable.
An ambitious prosecutor who wants a quick, visible arrest will seize on the most convenient suspect, here the victim's fragile sister, and bend the evidence to fit. Patient local police work, rooted in knowing the town, does better because it follows the evidence rather than the prosecutor's career.