Terrible news. Our thoughts and prayers go with the family and friends of the lost pilot and those involved. As with other forms of aviation safety systems, (radar, tcas, adsb, etc) flarm clearly offers a huge improvement in situational awareness but is in no way a guarantee of safety. One wonders if the volume was on, the flarm units were working properly, etc.

Did this accident happen in a thermal or on route? Any further information would be appreciated whenever possible. As you surely know the circustance of this accident (flarm on both aircraft) is very concerning.

Sean