A former Tel Aviv District prosecutor and top defense attorney was arrested this week on charges of obstruction of justice in a wide-reaching corruption case that has been described as an “earthquake” for Israeli law enforcement.Ruth David was arrested on Tuesday night on suspicion of obstruction of justice for assistance she gave her then client attorney Ronel Fisher, after his arrest back in July. She is suspected of contacting other people of interest in the case on behalf of Fisher, and helping them to corroborate their stories before police questioning.David spent decades as a Tel Aviv District prosecutor, before joining Fisher’s law firm in 2012. In the years she worked for the state she prosecuted a series of high-profile cases involving politicians, leading businessmen and organized crime figures.Fisher, a former top journalist and later a powerful defense attorney, was first arrested last July, on suspicion of brokering bribes between senior police officers and his clients. His clients were themselves the subject of police investigations and were willing to spend money to get information on the cases against them, police allege.On Monday, former Ma’ariv owner Ofer Nimrodi was arrested by Justice Ministry investigators on suspicion of trying to bribe Ch.-Insp. Eran Malka, in order to get information on a case he was being questioned in. Malka is believed to be at the center of the alleged bribery scheme run by Fisher.On Wednesday, after she appeared in court in Tel Aviv, David was ordered kept in custody until Friday, due to suspicion that she would try to interfere with the investigation against Fisher and his associates.