First I'll answer why I think the offenders haven't been caught yet. It's somewhat speculative on my part, but when a lot of these crimes are sexually motivated...and a lot of these crimes have no background connection between the victim and the perpetrator; they're what we refer to as “stranger-to-stranger killings”. When that is the case, that is perhaps one of the most difficult, if not very challenging, cases to solve. You require aggressive forensic work and aggressive, innovative thinking about catching the person as he does what he does. It's a very challenging set of facts.
In terms of why it took so long to create a task force, I think--