Uh... imagine you stab someone, and they figure out it was you but haven't found the knife yet. As this would be the nail in your coffin, you put the knife in an envelope and mail it to your attourney. Do you think that would work? no? then why should it in this case?
> But on the other hand, ABA Model Rule 3.4 (Fairness to Opposing Party and Counsel) states another widely recognized principle, that a lawyer may not “unlawfully obstruct another party’s access to evidence or unlawfully alter, destroy or conceal a document or other material having potential evidentiary value.” (The ABA Model Rules are the basis for most professional conduct rules that regulate lawyers at the state level.) The commentary to Model Rule 3.4 describes how courts have tried to split the difference between these two obligations.
> Shipp was an assistant bar counsel in 1983 when a lawyer called him with a dilemma. A client had just brought in a gun. The lawyer couldn’t turn the gun over to the police without revealing where it came from, but the lawyer couldn’t just keep the gun or dispose of it, either. What, the lawyer asked Shipp, should he do?
> Shipp called a contact in the U.S. attorney’s office, who suggested that Shipp take the gun from the other lawyer and deliver it to the police himself. So Shipp arranged to meet the lawyer, took possession of the gun, brought it back to his office, and called the police and told them to come and get it, which they did.