They did not reveal the name of the detained man, who is being held under anti-terrorist laws.
Mr. Gonzalez said parts of the anti-terrorist law would be revived in a new criminal code.
Their defence lawyers stayed away in protest at the toughening of Algeria's tough anti-terrorist law.
But at least 15 were said to have been detained under anti-terrorist laws, and 33 other people were still under interrogation.
Now prisoners sentenced under the anti-terrorist law are to be allowed to take part in cultural and sporting activities.
What is at issue, then, are the anti-terrorist laws and a European arrest warrant.
The constitutional reform which introduces anti-terrorist laws was approved by Congress amidst national and international debate.
But I disagree with him and others on the proper scope of the anti-terrorist laws.
Several of its members have been judged under anti-terrorist laws left from the Pinochet era.
The new anti-terrorist law allows police to detain suspects without charge for extended periods.