This is the third brief in the six-part series titled A Question of Evidence, Part Two. In this brief, Chris Baird identifies flaws in the logic employed to support the use of criminogenic needs (or dynamic risk factors) in risk assessment. While assessing needs is a critical component of assessment, much of what is advocated combines the roles of group data and the actual treatment needs of the individual. This brief also discusses the appropriate role of needs assessment in case planning and service delivery.