Who is responsible for the Sidama Loqee massacer?

Some names are being thrown around as being responsible for this crime. Hope someone can give us more info about this and educate us! 

The Loqqe Massacre of the Sidama Civilians

On May 24, 2002, Sidama people of all walks of life staged a peaceful, nonviolent and unarmed demonstration claiming their unconditional rights for regional autonomy that was accorded to the nations whose population is significantly smaller than that of theirs. The current estimated population of Sidama is over 5.5m. Despite their peaceful demand for regional autonomy, the demonstrators were met with live ammunitions from the army and the police forces that were assigned to monitor the protest. The regime�s political leadership from Sidama Zone, Southern Ethiopia Nations and Nationalities and People�s Regional State up to the central government carefully planned and managed the massacre.

Up to 100 Sidama demonstrators from whom 69 were confirmed were slaughtered in a broad day light for which neither the killers nor those who ordered the massacre were held accountable for their hideous crimes against humanity. To this date, the Sidama families whose fathers, mothers, sisters, brothers, relatives, sons and daughters died continually mourn their loss, and continue to do so until justice prevails.

 http://www.ethiopianreview.com/forum/viewtopic.php?f=2&t=42871