Allegations of excessive use of force are common in both law enforcement and security.  The article and video below illustrate the difficulty in determining whether force was excessive.

Article and Video

The The International Association of Professional Security Consultants (IAPSC) recently released a Use of Force by Security Personnel Best Practice:

 IAPSC Best Practices

The International Association of Professional Security Consultants, Inc. is the most widely respected and recognized security association in the industry. Its rigid membership requirements allow potential clients to select from an elite group of professional, ethical and competent security consultants.
The primary purpose of the IAPSC is to establish and maintain the highest industry standards for professionalism and ethical conduct. Our security association members are not affiliated with any product or service they may recommend, so the services they render are always in the best interests of the client.
Prospective organization members can be confident that IAPSC membership will enhance their professional image. Each IAPSC security consultant is a recognized professional with a proven track record in their area of expertise. Whether your project involves security management, physical security, security systems, information security or any combination of these, you will receive quality performance from every member of our elite security association. In addition, with less organizational overhead, proposals from IAPSC teams are highly competitive.