  Multi-year digital forensic backlogs have become commonplace in law
enforcement agencies throughout the globe. Digital forensic investigators are
overloaded with the volume of cases requiring their expertise compounded by the
volume of data to be processed. Artificial intelligence is often seen as the
solution to many big data problems. This paper summarises existing artificial
intelligence based tools and approaches in digital forensics. Automated
evidence processing leveraging artificial intelligence based techniques shows
great promise in expediting the digital forensic analysis process while
increasing case processing capacities. For each application of artificial
intelligence highlighted, a number of current challenges and future potential
impact is discussed.
