[QUOTE="Chiparlor, post: 167234, member: 3738"
Just my opinion that I think there ought to be time limit between the approved warrant and date of arrest.[/QUOTE]
Arrest warrants are open-ended primarily because there is a strong possibility that the subject may be "unavailable" for various reasons (i.e. subject in custody by another agency (Federal, state, local), not wanting to "tip off" other suspects, subject in hiding or out of state/country, etc.).
I DO agree that, barring unusual circumstances, warrant should be executed as quickly as practical/possible