This must have been a most harrowing task for the family to undertake, however it does set an example for others to follow. Far too many people in N.Ireland let the authorities get away with murder!
The authorities must be held to account when they are responsible for evil.
Romans 13:4 For he is the minister of God to thee for good. But if thou do that which is evil, be afraid; for he beareth not the sword in vain: for he is the minister of God, a revenger to execute wrath upon him that doeth evil.