Global Security Services
1003 West 4th Street,Davenport,IA 52802
tel: (563) 359-3896; (866) 359-3896 (toll-free)
Per Mar Security Services - Investigation Division
5424 Tremont Avenue,Davenport,IA 52807
tel: (563) 344-4250
Smith Investigative and Security Services
P.O. Box 55,Davenport,IA 52805
tel: (309) 236-7875