I have made reference recently to various sources of data which potentially provide information for use in civil and criminal proceedings and which go well beyond conventional sources such as email.
One of those was the data created by a heart pacemaker in a case involving an allegation of arson in Ohio. A cardiologist who looked at the data found inconsistencies between the information returned by the device and the story told by its wearer. A judge in Ohio has now ruled that this data is admissible.
There is an article about it, appropriately enough in a website called Insurance Fraud News, which you can find here.