The exclusionary rule.
In America, the 4th Amendment says that evidence cannot be used if it has been illegally obtained, so no.
The accused has the right to challenge the admissibility of any evidence used against them at trial. Whether an e-mail or any other evidence is "illegally obtained" is subject to the interpretation of the court, not the accused. If the court rules that evidence is obtained unlawfully, it can be suppressed at trial and not considered.
exclusionary rule
exclusionary rule
exclusionary rule
exclusionary rule
exclusionary rule
Mapp v. Ohio
In law this is known as the exclusionary rule.
In Weeks v. United States, 232 U.S. 383 (1914), the United States Supreme Court unanimously held that the warrantless seizure of items from a private residence constitutes a violation of the Fourth Amendment. It also set forth the exclusionary rule that prohibits admission of illegally obtained evidence in federal courts.See below link:
if an unlawful search of your property/residence/vehicle is conducted without your consent, and evidence of a crime is found, its an illegal search, the judge can throw out the evidence if an illegal search was done
Unless you are willing to reveal your source of information, you have NO evidence. Evidence is only able to substantiate claims if it can be proved.