Efforts to prosecute a federal agent involved in a deadly crash in Salem have officially come to an end after years of legal challenges.
Authorities say Samuel T. Landis, an agent with the Drug Enforcement Administration, was accused of running a stop sign during a 2023 surveillance operation and fatally striking cyclist Marganne M. Allen, 53.
Allen, a mother of two and longtime employee with Oregon state agencies, was taken to a hospital after the collision but later died from her injuries…