The X2 model, shown here, holds two cartridges, so it can fire two sets of darts without reloading. Taser markets several different cartridges with ranges from 15 feet to more than 25 feet.

Mr Begley's mother Dorothy said the probe is "a whitewash" and "five years ... He was shot with the 50,000 volt Taser gun from a distance of 28in (70cm) and was hit with "distraction strikes ...