A second suspect has not yet been located.
U.S. Marshals conducted joint arrests in Pierce County Thursday.
The suspect told dispatchers he did not plan to stop for police.
One person was shot in the leg during the Labor Day Weekend incident.
Councilmembers lamented the lack of state and federal regulations surrounding the over-the-counter drug.
Police say the suspect posed as a federal agent to collect cash and gift cards from the victim.
The scheme reportedly robbed an elderly resident of more than $1 million.
Officers noted the suspect was unarmed at the time of his arrest.
Court documents say the suspect hurled racist insults at the Hispanic victim and his son in the men’s bathroom.
The city warned residents of similar scam attempts earlier this year.