Can the gorvement of Rwanda incarcerate a civilian because of tweets?

 There is rumour that a certain Francis Mushinzimana has been missing for nearly a fortnight,none knows his where about.There are claims that state security agents may have arrested him because of his tweets that apparently unveil some wrongs on government policies .His latest tweet was on the ownership of the Presidential jet that may have finally cemented the long awaited need for his arrest.Many claim that he is blamed for siding with Wazalendo,trying to blame Rwanda's relationship with neighbours,supporting FDLR and supporting Ingabire Victoire among others.Below are some of the tweets he did over time that may have landed him in trouble!