Quran: [17:36] "You shall not accept any information, unless you verify it for yourself. I have given you the hearing, the eyesight, and the brain, and you are responsible for using them."
Quran: [49:12] "O ye who believe! Avoid suspicion as much (as possible): for suspicion in some cases is a sin: And spy not on each other behind their backs. Would any of you like to eat the flesh of his dead brother? Nay, ye would abhor it...But fear Allah. For Allah is Oft-Returning, Most Merciful."
False accusation of people is a crime in Islam
The real cause of which is ill-feeling and hatred. Since it is extremely effective in mutilating the realities and to condemn the innocent persons, Islam has declared it to be the worst kind of falsehood.
33:58 (Y. Ali) And those who annoy believing men and women undeservedly, bear (on themselves) a calumny and a glaring sin.
33:58 (Picktall) And those who malign believing men and believing women undeservedly, they bear the guilt of slander and manifest sin.
Aisha, may Allah be pleased with her, narrates that the Prophet, peace be upon him, asked his companions, "Do you know what is the worst aggression?" They said, "Allah and His messenger know better." He said, "Before Allah the worst aggression is to make Halal (permissible) for oneself the honour of another Muslim."
For those guilty of falsely accusing any person, Islam has decreed punishment in this world also, and it is difficult to imagine the punishment in the next world. The Messenger of Allah said, "He who, in order to find fault, says something about a person that was not there, Allah will throw such a person in hell till he tastes fully what he had fabricated." (Tibrani)
The Prophet also said, "He who has harmed his brother's rights or has hurt his honour, then he should please him today, before the day comes when there will be neither dirham nor dinar with him." (Bukhari)