Liability coverage for security patrol and detective agencies is available from primarily excess and surplus lines markets and specialty coverage programs. Underwriters pay close attention to employee training, use of firearms, the exact type or nature of patrol work performed, use of guard dogs, and previous losses. Premium is based on payroll and coverage is subject to a deductible. Some underwriters and programs include professional liability coverage and personal injury liability coverage. This explanation of insurance benefits is provided by Insurance Marketplace.