Darren Vann, 43, confessed to strangling a woman whose body was found at a local motel on October 17.
He directed authorities to at least three other bodies, while three more were found over the weekend.
The body of Afrikka Hardy, 19, was found at a Motel 6 on October 17. She was reportedly strangled.
A police official has said Afrikka Hardy was involved in prostitution and met Darren Vann at the motel. Authorities were contacted by someone attempting to but unable to reach the victim.
A second victim has been identified as Anith Jones, 35, though tests to determine cause of death have yet to be performed on her or the other unidentified victims.
Anith Jones, missing since October 8, was found in an abandoned home.
Officials say Darren Vann confessed during an interview and told police where several other victims were located.
Investigators have yet to say how he knew the victims or offer a motive in the attacks.
On October 20, Hammond, Indiana, Police Chief John Doughty informed reporters Darren Vann had told investigators he may have killed people for up to two decades.
John Doughty also said the victims discovered over the weekend had all been killed recently, but he did not stipulate whether there may be more murders unaccounted for.
The mayor of Gary, Indiana said Darren Vann had previously been convicted of s** crimes in Texas in 2009.
It is unclear how long Darren Vann has been in Indiana, or if more bodies will be found as the investigation continues.
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