If you accused someone falsely, that will be Allah's curse on you in this Dunya and Akirah. False accusation is one the greatest sins, as is false witnessing. When the wrongdoers accused our prophet Muhammad SAW of lying, He said if he is lying, that will be for his own detriment. The evil doers are not in tranquil because of what their hands have sent forth. They are scared and worried, so they want to fight and silence their victims. Allah's sees, hears, and witnesses everything we are doing. May Allah protect and forgive us.