"This is a joint investigation at this point, between Indiana State Police and the [City of] Fairfield Police Department," Sgt. Houze said.
Houze said Indiana investigators will begin going through Fairfield's case file and will assist in re-interviewing family, friends and witnesses.
"Maybe Indiana State Police can find something because they have fresh eyes and Fairfield police have been so close to the case for so long," Houze said. "Have you ever written something and proofread it, proofread it, proofread it, then you turn it over to someone else to read, and they immediately spot a typo?"
"This is a death investigation," Fairfield Police Chief Michael Dickey said. "We're basically starting a new investigation from scratch."
Dickey said ISP was in Fairfield Thursday to review evidence, and that they will be re-interviewing everyone involved in the case.
"We've agreed with Indiana that because Markham's body was found in Indiana and it's their jurisdiction, any new information will come from them," Dickey said.
Franklin County Coroner Wanda Lee says Markham's remains are still in their custody even though they've been transported to Hamilton County. Tests will be performed for weeks, even months if necessary.
A specific date for when the remains will be released to the Markham family has not been determined.
Leave your condolences and see the community's outreach in remembering Katelyn at http://goo.gl/gB2le.