A person offers money to a witness in exchange for testimony that is otherwise correct if he just forgets to mention the second suspect that acted as the lookout. What offense has occurred?

The offense that has occurred is tampering with a witness. This action involves an attempt to manipulate or influence a witness's testimony, which is what happens when someone offers money to a witness with the expectation that they will alter their account of events. In this scenario, the offer is made for testimony that is largely accurate, but with a critical omission—the second suspect acting as a lookout. By trying to persuade the witness to withhold information or alter the truth, the person is interfering with the legal process.

In contrast, bribery typically involves offering something of value in exchange for favorable outcomes, which can include but is not limited to testimony; however, the core element of tampering is specifically the intent to influence or change that testimony. Perjury refers to the act of lying under oath, which does not apply in this situation since the witness is being incentivized to omit rather than fabricate false information. Obstruction of justice is broader and can encompass various actions that hinder the justice process, but in this case, the act of specifically offering a bribe to modify witness testimony fits the definition of witness tampering more precisely.