Austin Robert Drummond, 28, faces charges in the deaths last month of James Matthew Wilson, 21; Adriana Williams, 20; Cortney Rose, 38; and Braydon Williams, 15.

As the weeklong manhunt for the suspect arrested in the killings of four relatives of a baby found abandoned in Tennessee came to an end on Tuesday, police revealed the suspect’s girlfriend is related to the victims.

Austin Drummond is facing four counts of first-degree murder, one count of aggravated kidnapping and weapons offenses.

The family was found dead and the infant - in a car seat - was left abandoned at a stranger's home about 40 miles away.

A man suspected of killing four family members in Tennessee has been captured, authorities said. Austin Drummond's arrest on Tuesday morning ended a manhunt that started a week ago. Drummond, 28, has been charged with four counts of murder in the first degree and lesser charges in the killings of the four relatives.

Authorities believe the family’s killings were a targeted attack by Austin Robert Drummond, who had a relationship with the victims.

A manhunt for the suspect in the Tennessee kidnappings and killings of four people, including three from the same family, ended Tuesday, police said.

Authorities had been searching for Austin Robert Drummond since July 29, when four people were found dead and an infant was abandoned in northwest Tennessee.