What to know who calling

Got a call from this number from a fast talking man who told me to call a844 number who said he was the state police with a case number but didn't say what it was about

Got a call, on my residence phone and then on my cell phone, from a fast talking woman, who said something about a case being filed against me and that unless she heard differently she would be out to see me on the 12 of Apr

Said he had a judgement on me to pay up or he would come to my home.

A "judgement" is made by a court.
If you were being sued over a debt, you would have received a summons to appear in that court.

A phone call, email or text message from a supposed debt collector is not legally sufficient evidence of debt.

The Fair Debt Collection Practices Act (FDCPA) includes statements such as this:

Every collector must send you a written “validation notice” telling you how much money you owe within five days after they first contact you. This notice also must include the name of the creditor to whom you owe the money, and how to proceed if you don’t think you owe the money.   ["Written" means snailmailed - US Mail ... not emailed or texted]

Source:
https://www.consumer.ftc.gov/articles/0149-debt-collection

Therefore, if that caller wants you to pay immediately, before you get the written validation notice via snailmail, or if the caller wants payment via Green Dot, MoneyGram, Western Union, prepaid gift card or other untraceable means, then the call is definitely not legitimate.

IF you wish to communicate with the supposed collector / creditor, visit  the following page, for example "Action Letters" to snailmail:
http://www.consumerfinance.gov/blog/debtcollection/

If you KNOW you owe no money, or believe the call was from a fake debt collector, please take the time to read this:
http://www.consumer.ftc.gov/articles/0258-fake-debt-collectors

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Please reply to this post, to let us know you read it, or have taken suitable actions to protect yourself.