Should a forbidden picture of a girl be deleted and her bad deeds kept silent, or should her guardian be informed, for fear of fitna?

Spying is unlawful except in specific circumstances. It is obligatory to delete the woman's picture, and it is impermissible to keep it; the fundamental principle is to conceal her faults. If suspicious behavior is observed from her, she should be advised through a righteous woman. Otherwise, her guardian should be informed to restrain her.