Nearly 200 policemen and Mubarak-era officials have been charged with the killing of 900 protesters in various trials since his ouster. Most of the suspects have been acquitted.
Lawyers and rights activists say the prosecutors' cases are weak and laws have no adequate provisions to try officials for such crimes.
Egypt's state news agency MENA says the court today found the policemen, a businessman and his three sons not guilty of killing 17 protesters in January 2011 in Suez a city at the southern tip of the Suez Canal that saw some of the first protester deaths in dramatic confrontations with police.