CAIRO, June 28 (Xinhua) -- Egyptian prosecutors said on Monday that investigations into the death of a young blogger allegedly killed by two police agents showed he was a drug addict. Khaled Mohamed Said, 28, who died of asphyxia after swallowing a packet containing bhang narcotic was a drug addict, the report published by state-run MENA news agency said. Investigations showed the young man has been sentenced to three- month imprisonment and dismissed from military service in 2004 over disciplinary violations that included possession and addiction of narcotics. The Egyptian blogger was also sentenced to three-year- imprisonment in 2002 over drug-possession charges, but was acquitted after a retrial, the report added. The preliminary results of a second autopsy on the blogger said the man died of asphyxia confirming the results of the first autopsy report and the police account. However, human rights groups said the young man was beaten to death by two plainclothes police agents in retaliation for spreading a video showing policemen distributing the seized drugs among themselves, which was denied by the police.