  The technological advance of drone technology has augmented the existing
capabilities of flying vehicles rendering them a valuable asset of the modern
society. As more drones are expected to occupy the airspace in the near future,
security-related incidents, either malicious acts or accidents, will increase
as well. The forensics analysis of a security incident is essential, as drones
are flying above populated areas and have also been weaponised from radical
forces and perpetrators. Thus, it is an imperative need to establish a Drone
Digital Forensics Investigation Framework and standardise the processes of
collecting and processing such evidence. Although there are numerous drone
platforms in the market, the same principles apply to all of them; just like
mobile phones. Nevertheless, due to the nature of drones, standardised
forensics procedures to date do not manage to address the required processes
and challenges that such investigations pose. Acknowledging this need, we
detail the unique characteristics of drones and the gaps in existing
methodologies and standards, showcasing that there are fundamental issues in
terms of their forensics analysis from various perspectives, ranging from
operational and procedural ones, and escalate to manufacturers, as well as
legal restrictions. The above creates a very complex environment where
coordinated actions must be made among the key stakeholders. Therefore, this
work paves the way to address these challenges by identifying the main issues,
their origins, and the needs in the field by performing a thorough review of
the literature and a gap analysis.
