This paper proposes a conceptual integrated Motivational Interviewing (MI) plus Good Lives Model (GLM) framework and uses hypothetical data to illustrate how its effectiveness could be evaluated in practice. A logic model based MI–GLM intervention is outlined, and a hypothetical cohort of 200 participants receiving 10 MI sessions blended with GLM principles is considered to demonstrate potential outcomes, including motivation, goal attainment, recidivism, life satisfaction, and psychological well being. In this illustrative scenario, key performance measures are assumed to improve from pre to post intervention; for example, motivation and goal attainment scores increase, recidivism rates decrease, and life satisfaction and psychological well being scores rise in a clinically meaningful way. A hypothetical ablation comparison suggests that an integrated MI–GLM configuration could perform better than MI only and GLM only versions, with a notional control group showing the weakest outcomes across all indicators. These illustrative patterns highlight the potential of an integrated MI–GLM framework for improving rehabilitation related outcomes for people with intellectual disabilities who are at risk of offending and for guiding future program design. Future empirical research is required to test this conceptual model, validate these assumptions, and examine the feasibility, implementation challenges, and cost effectiveness of such an intervention in real world forensic and community contexts.