Thanks for the replies to date.
When the original question about arrest warrants caught my attention, I decided I ought to know more about search warrants (a decision I'm beginning to regret), a wide subject, given the possible reasons for someone to want one. Therefore, I set out what I hoped was a case where the suspect was suspected of a serious crime, murder, of having committed it more than once, and of being about to commit it again (unless first apprehended). I should have made it clearer that the suspicion was that the suspect was a professional killer. Sorry for not doing so. A search warrant was wanted for his unoccupied premises as it was believed that there would evidence there of his present whereabouts.
I constructed a fictitious case with the aim of presenting a question that would secure a clear answer. You know what I got. I hope I may try your patience by reposing my question.
The suspicion is that a professional killer is about to kill again and that evidence of his present location is in his unoccupied home. Were I a judge, I'd grant a search warrant pronto. Is it not possible to say, from experience, if the 'typical span of time' for the securing of a warrant in such circumstances would be between one minute (the phone call solution) and three days (or three weeks, or three months)? It's hard to credit that a suspected killer would be allowed an abundance of time to kill again.
Yes, I'm an ignorant non-police, non-legal citizen, but surely there's a limit to how long it's PROBABLE the issue of a warrant would take in a case of suspected murder. Please help, somebody.
"Curiosity killed the cat, and right now I feel very feline" - John Truman, 2012.

