A close friend who had taken part in the same demonstration had disappeared into Tehran's notorious Evin prison, and a phone call from someone claiming to be from the security services led Ahmad to believe he might be next.
Demonstrations may have disappeared from Tehran's streets of shame, but Iranian acceptance is at an all-time low.
"The press all thought that was the end of the demonstrations and all disappeared and I went to bed," says Lord Steel.
In other parts of the country, women have all but disappeared from demonstrations as violence has intensified.
Instead, Mrs. González began to organize with other families of the disappeared, holding demonstrations that the Pinochet security forces would break up.
There have been few demonstrations by the families of disappeared people since December, when two young campaigners for the families themselves vanished in the northern city of Jaffna, our correspondent says.
Today, even though the demonstrations in the streets have disappeared from cable news, the debate in Iran has been elevated from vote counting and ballots to treason and apostasy.
NOW that army troops were monitoring the demonstrations, the police force had completely disappeared from the streets, as if to taunt people with the choice between their presence and chaos.
The tanks fire shells, machine guns spray bullets and the demonstration ground almost disappears in clouds of smoke.
In 1963, a sacred relic — a hair of the Prophet's beard — disappeared from the Hazratbal mosque in Srinagar, and demonstrations erupted.
