Keeps calling my job

Called my job and asked for the name and information of my attorney. The called ID stated Darby MT. Threated to have me arrested and brought before him within 24 hours. I'm in California. Checked phone number via White Pages.com and was unable to verify if this really was from a law office.

These dumb [***] ppl just called me threatening to have me arrested and said he was going to call my job. Scam artists

This person called repeatedly with an accent I could barely understand.He called my phone around 7 P.M. and I declined each time.Then left a message saying they were going to come and arrest me at 11:00 A.M. Monday.How did these people get my number?