With the global diffusion of cybercrime, the ever-growing market penetration of high-performance and low-cost personal digital devices, and the commercial success of cloud computing, the area of digital forensics is faced with various new challenges that must be taken seriously. In this chapter, the authors describe a novel approach to digital investigations based on the emerging “Forensics as a Service”(FaaS) model. This model attempts to optimize Law Enforcement Agency’s (LEA) forensic procedures, reduce complexity, and save operational costs. Inspired by previous work on distributed computing for forensic analysis, this chapter provides the reader with design guidelines of a FaaS platform for secure service delivery. The proposed FaaS platform should be able to support investigators and practitioners in their daily tasks (eg digital evidence examination, analysis, and reporting) once implemented by a cloud forensic provider or internally by a LEA. In this chapter, the authors also present the architecture components, interfaces, communication protocols, functional and non-functional requirements, as well as security specifications of the proposed framework in detail.