Hanover security company Eyewitness Surveillance has secured a $15 million line of credit from Chicago-based The PrivateBank. The new financing will be crucial for Eyewitness as it looks to expand to new markets and enhances its video monitoring systems. Eyewitness, launched in 2004, specializes in remote interactive monitoring systems designed to prevent theft and inventory damage when there is not a guard on site. The company’s clients include midsize and large car dealerships, metal recycling…