An abandoned baby. A murdered family. Now, a suspect is wanted.

Authorities are searching for the man they say is linked to the four people found dead in Lake County, Tennessee, earlier this week.

The U.S. Marshals Service and the Tennessee Bureau of Investigation are offering up to $15,000 for information leading to the capture of Austin Robert Drummond for the July 29 quadruple homicide.

The victims were identified as 15-year-old Braydon Williams, 20-year-old Adrianna Williams, 21-year-old James M. Wilson, and 38-year-old Cortney Rose. Their bodies were discovered in Tiptonville hours after authorities found an abandoned infant in a car seat outside an estimated 40 miles away near Tigrett in Dyer County.

Now, Drummond is on the state's most wanted list for first-degree murder, felon in possession of a firearm, aggravated kidnapping, and possession of a firearm during the commission of a dangerous felony. The 28-year-old suspect is said to be driving a 2016 Audi A3 with a Tennessee plate: RI 01896, according to the TBI.

"Getting Austin Drummond in custody is a priority. Anyone with information about where we can find him should call us immediately," U.S. Marshal Tyreece Miller said in a statement. "You will remain anonymous."