Which of the following cases establishes that premeditation must be proved for Murder 1 charges?

The case that establishes that premeditation must be proved for Murder 1 charges is indeed MN v Leake. In this case, the Minnesota Supreme Court clearly articulated the requirement that to convict someone of first-degree murder, there needs to be evidence demonstrating that the act was planned or premeditated. This means the defendant not only intended to kill but had time to reflect on that intention, distinguishing it from second-degree murder, where premeditation is not a requisite element.

The context of Leake emphasizes the importance of demonstrating that the defendant had a conscious decision-making process leading up to the act. This nuanced understanding highlights how the legal system differentiates levels of intention behind homicides, ensuring that those facing first-degree charges are appropriately held to a higher standard of proof regarding their mental state at the time of the crime. This case plays a pivotal role in shaping the legal landscape around premeditation in Minnesota's murder laws.