By Hanna Park, Chris Boyette, CNN

(CNN) — Investigators are looking for a man they allege killed four relatives of a Tennessee baby who was found abandoned alive this week in sweltering heat, the Tennessee Bureau of Investigation said Thursday.

Austin Robert Drummond, 28, is wanted in connection with the deaths of James M. Wilson, 21; Adrianna Williams, 20; Cortney Rose, 38; and Braydon Williams, 15, whose bodies were found Tuesday in Tiptonville, a town in northwest Tennessee’s Lake County, the TBI said.

The four were found dead hours after Wilson’s and Adrianna Williams’ baby daughter was found abandoned Tuesday afternoon in a car seat in a “random” front yard near the Dyer County community of Tigrett, nearly a 40-mile drive southeast of Tiptonville, authorities had said.

The TBI has

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