"We're making progress, there's been some headway," said Jerrell, "but there are unanswered questions and we still do not know Katelyn's whereabouts."
Katelyn Wolfe, 19, reported missing by her father, communicated with someone around 3 a.m. on Thursday, June 6, when she would have been in the area of C Street NW in Linton. Jerrell said Wolfe was on the phone talking to someone and was looking for people to "hang out with."
Since that time, there has been no activity on her cell phone or her Facebook account.
Jerrell said there were no arguments or fights in the home and nothing to indicate she intended to leave for an extended period of time -- she did not take make-up, personal items or extra clothing from her home.
"The first 24 to 48 hours are crucial in a missing person case, and she's not turned up," said Jerrell.
In some cases, a person who's been reported missing will pop up and explain they were staying at a friend's house, but that is not happening in this case.
"We do believe she's in danger."
Officers have been working long hours and Jerrell said they'll continue their efforts to find Wolfe.
"We have a team of investigators including our officers, detectives and staff, and officers and detectives from the Indiana State Police coordinating efforts in the investigation of this case around the clock since the time she was reported missing," said Jerrell.
"We are following up on every lead that comes in, and this takes time.
"It is crucial -- that anyone with pertinent information come forward with whatever information they might know."
Police are asking the public to call if they might have seen something or know something.
Wolfe is 5 feet 2 inches tall, weighs about 110 pounds, has black hair, blue eyes and may be wearing glasses. She was believed to be wearing blue jeans and a black and white striped shirt, and she wears a nose ring in the middle of her nose.
Jerrell requested that people with information do not post it on Facebook or online, but contact law enforcement.
"Crimestoppers is offering a substantial reward for information on Katelyn's whereabouts," said Jerrell.
Anonymous tips may be called in to Greene County Crimestoppers at (812) 847-5463 or (812) TIP-LINE which is the main phone number.
Crimestoppers also has a toll-free number so that all Greene County residents can call in at no cost to the caller. The toll-free number is (866) 446-4672.
In addition, Jerrell said anyone with any information regarding Wolfe's whereabouts is asked to contact the Linton Police Department by calling 812-847-4411.