Hiring of security companies as independent contractors

What causes of action must employers be concerned about in hiring, retaining, disciplining, and terminating personnel?
Businesses often feel that the hiring of security companies as independent contractors will shield them from potential liability. Is this belief generally dependable?
Name the types of remedies that exist under 42 U.S.C. 1983
Does moonlighting give greater strength to a plaintiffs or claimants argument that civil rights have been violated under 42 U.S.C. 1983?