US v. Sierra-Jimenez, No. 21-1915 (1st Cir. 2024)
Annotate this CaseJuan Sierra-Jiménez was a felon who pled guilty to possessing a firearm. While on supervised release for a prior federal firearm offense, Sierra was arrested and found with a Glock 22 pistol, which had been modified to function as a machine gun. He was also in possession of extra ammunition and approximately five grams of a substance suspected to be heroin. Sierra was sentenced to fifty-eight months in prison and an additional consecutive eighteen-month supervised release violation sentence. Sierra appealed, arguing that the fifty-eight-month sentence was procedurally unreasonable and that the government breached the plea agreement regarding his eighteen-month sentence. The United States Court of Appeals for the First Circuit rejected Sierra's arguments and affirmed the lower court's decision. The court ruled that the district court did not clearly err in its factual findings and did not rely on the suspected heroin possession in determining Sierra's sentence. The court also found that Sierra failed to show that the government's lack of an oral recommendation for a concurrent sentence prejudiced him.
Some case metadata and case summaries were written with the help of AI, which can produce inaccuracies. You should read the full case before relying on it for legal research purposes.
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.