But the FBI said the detonating system and method of initiation for the devices are still unknown.

CNN: Boston Marathon attack: More details, more questions

If you are an entity with assets that can potentially be diverted, stolen, converted to personal use, or employees that can be corrupted, then you should consider the initiation of a confidential reporting system that provides a method for honest employees to report waste, fraud, and abuse.

FORBES: A Snitch In Time Can Save Employers a Lot of Money