After his arrest, Abba was held incommunicado for nearly three months and was tortured by the intelligence services. He then faced the possibility of being sentenced to death by court martial.
A military court finally sentenced him in April to ten years in prison on charges of "failing to report acts of terrorism to the authorities" and "laundering the proceeds of an act of terrorism."
The military appeal court has quashed his conviction on the first charge but upheld his conviction on the second one.
"Nothing can compensate the lost years in prison but we are relieved to know that Ahmed Abba will soon be reunited with his family," said Clea Kahn-Sriber, the head of RSF's Africa desk.
"This is a mixed decision inasmuch as only part of Abba's conviction has been overturned and he has to pay exorbitant court costs. We maintain that he should never have been imprisoned.”
For the past two years, RSF has constantly called for Abba's release and criticized the lack of transparency of the judicial proceedings against him. In its most recent release, issued jointly with the Committee to Protect Journalists, RSF said Abba had been the victim of a "judicial conspiracy" and again demanded his release.
Cameroon is ranked 130th out of 180 countries in RSF's 2017 World Press Freedom Index.