The standard for government ministers is that they must resign once indicted of a crime which involves moral turpitude. Katzav should try to uphold this standard and not resign right away so that the Israeli public has a chance to internalize the concept of "innocent until proven guilty" (more or less). The assumption of innocence applies at least until indictment. As of now, the Attorney General only decided that he is likely to indict Katzav. The final decision will be made only after a formal hearing of Katzav and his lawyers before the AG, when he gets a chance to try and convince the AG of his innocence. This step may happen in some 3 months (preparation time for the lawyers), after which the indictment will either be affirmed or not. Katzav promised in the past that he will suspend himself if the AG decides he is likely to indict (which just happened). No doubt, tomorrow he will ask the Knesset to give him this leave of absence. Let us just follow this reasonable process.
Australian police arrest 5 over shooting 'linked to terrorism' (Reuters)
from the article: President, lawyers: 'Slim chance' Mazuz will waver