The duo is accused of disobeying lawful orders given by Kampala South regional police commander Siraje Bakaleke.
This was during a meeting at Sharing Hall Nsambya in April 2015 where Besigye and opposition officials were supposed to discuss constitutional amendments.
The pair was arrested and locked away before being produced in court for disobeying lawful and malicious damage.
Gladys Kamasanyu Musenze, the Makindye Grade one Magistrate, dismissed the case on Monday saying prosecution has been promising to produce witnesses since the case started in May 2015 in vain.
The magistrate said the state prosecutors failed to adduce evidence and witnesses.
Besigye is now contemplating suing government for malicious prosecution.
Forum for Democratic Change [FDC] said in a short statement that “today’s case has crumbled under the weight of its foolishness”.