What's your point? 18 months to resolve a criminal case seems reasonable. There's no particular need to move faster. Delays in criminal cases usually happen with the consent of the defendant since they consider it advantageous to have more time, especially if they're not being held in jail. Defendants can usually accelerate the process if they insist on maximally exercising their 6th Amendment rights but most don't.
I might agree that the arrest typically happens quickly (if it happens at all) in violent crimes, but it is extremely slow for white collar crimes.