NAVI MUMBAI, Feb. 19 -- A 58-year-old professor from a reputed medical college in Nerul fell victim to a 'digital arrest' fraud, losing Rs.1.81 crore over a period of 15 days. The fraudsters tricked her into believing that they were from the income tax department and had information that a firm in her name in Delhi had a tax liability of Rs.8 lakh....