The girl had a soft voice and said if I didn't call back that there will be criminal charges against me!!!!

They said someone filed a complaint against me but the number is unknown and when I goggle the number nothing comes up.

My mother just returned a call from this number. They requested her to "verify" her personal information by telling her to tell them her address, phone number (even though they already have her phone number because how else could they have called, right?) and some other personal information. They stated that she was involved in a lawsuit and that a law firm wanted this information about her. But my mom is no dunce so she didn't give them any of it.

Very likely to be a phishing scam looking to obtain people's information under false pretenses.

Steve Collins 855-427-9316 ref file #355609
Caller left voicemail stating a complaint has been filed against me.
"The firm needs to hear from you within the next 24 hours or forced to make the decision without your consent"
Caller ID shows "National Locati" but the voice mail shows "restricted".