Authorities found clown masks and a large knife in the backseat of an SUV with Texas tags. Police arrested the driver of that vehicle in Tennessee.

WUSA9 has confirmed that driver, 19-year old Ismael Antonio Hernandez Navarro, is wanted for a gang-related murder in Virginia.

Navarro is now one of at least five other suspects in custody. A source told WUSA9 the suspects are MS-13 gang members.

The teen killed was 18-year-old Miguel Ruiz Carrillo from the Mt. Vernon Section of Fairfax County, Va.

RELATED: Man caught in Tenn. was wanted for murder of Virginia teen

His family had reported him missing when he didn't return home in early August. Fairfax County police put out an alert for an “Endangered Missing Teen” on August 8th.

Six days later, police announced the arrest of 20-year-old Jose Vincent-Sosa and 18-year-old Edwin Dinart Moreno, along with an unnamed juvenile female.

The three were charged with the victim's abduction and gang participation.

Then, on August 22nd, investigators discovered human remains in the Nokesville area of Prince William County near Nokesville Rd. and Fauquier Dr. It's reported the victim may have also been involved in gang activity unbeknownst to his family.

RELATED: Remains of missing Fairfax teen found in Prince William County

The big break in the case came in September of 2017 when Marshals arrested a 28-year-old in Georgia named Hector Gamez-Amaya. According to PWCPD, detectives had determined Gamez-Amaya was directly involved in the victim's murder.

The Washington Post says he may be the clique leader known as "Bunny" according to what our editorial partner found in an unsealed search warrant. Gamez-Amaya is facing first-degree murder.

Two more important arrests came this week. Both suspects are just 19-year-olds.

On Monday, December 18th, members of the U.S. Marshals Fugitive Task Force located and arrested Tomas Pino-Mejia in Frederick, Md. He was charged with first-degree murder along with 19-year-old Ismael Hernandez-Navarro, who was arrested two days later on December 20th.

We're told law enforcement “pinged” a cell phone to track Hernandez-Navarro in Tennessee. That's where authorities confiscated his blue SVU after discovering clown masks along with a large knife in the back.

Our sister station in Knoxville, Tenn., WBIR, reports Hernandez-Navarro has arrest warrants for murders in both Virginia and Texas.

Even after ICE's nation-wide "Operation Raging Bull" crackdown, police are still making significant MS-13 arrests. Not the feds, but local and state police are pushing to across states to solve this case.

The immigration official believes Pino-Mejia, Hernandez-Navarro and Gamez-Amaya all entered the country illegally. The official confirmed at least two detainers have been launched. There may be a third.