Jawar, had been missing in action since his release from prison.
The investigation faced significant setbacks, including the detention of key witnesses and family members by police, ostensibly for their protection.
Bate was a political officer with the OLF, a legally registered opposition group that boycotted elections in 2021.
Bate Urgessa, a member of the Oromo Liberation Front (OLF), was reportedly killed while visiting his hometown of Meki in Oromia.
Bate Urgessa, an outspoken politician has already spent years in and out of detentions on several occasions.