The voicemail told me that if I didn't call, after 24 working hours have expired, I will be taken under custody (??) by the local cops as there are four serious allegations pressed on your name at this moment. We would request you to get back to us so that we can discuss about this case before taking any legal action against you.
I think people are taken "into" custody, not "under." And the professional reference to "cops" would be "police." Can't even imagine what serious allegations they would have against me. Clearly a scam!