Police in Colorado say they have arrested 22-year-old Stevie Marie Vigil, who allegedly supplied a weapon to convicted felon Evan Ebel.
Ebel was killed last week in a Wise County shootout after wounding Montague County Deputy James Boyd.
Ebel has also been linked to the murder of Colorado prisons chief Tom Clements and the slaying of a pizza deliveryman.
The Colorado Bureau of Investigation said Vigil was arrested Wednesday night for allegedly purchasing the weapon later used to murder Clements and then transferring it to Ebel earlier this month.
The gun was recovered in Texas in the car where Ebel was shot.
If convicted, Vigil faces a penalty of between two and 16 years in prison and a fine of $500 to $2,000.
Investigators still aren't sure why Ebel was driving through Texas when he got into that deadly confrontation.