A violent altercation on northbound Interstate 5 in Federal Way, Washington, resulted in one fatality and three injuries. The incident involved four individuals in a black BMW: the driver was fatally stabbed, another male sustained multiple gunshot wounds, and both a male and a female passenger were hospitalized with stab wounds. The Washington State Patrol and the Washington State Department of Transportation responded, causing significant traffic delays in the area. The exact circumstances leading to the incident remain under investigation. Updates are expected as more information becomes available.