5:14
- ABC News
- April 23, 2019
Mystery deepens in Delphi girls' double murder
Abby Williams, 13, and Libby German, 14, were killed on Feb. 13, 2017.
5:14
Garrett said that particular trail likely wouldn't have visitors from outside the area.
\"The idea that a random person would happen to be walking down the railroad track and happen upon these two victims, and that they had never been there before, I think is low,\" Garrett said.
![\"PHOTO:](\"http://a.abcnews.com/images/US/abc-delphi-bridge-jc-170306_4x3t_384.jpg\")
Serial offenders often do not leave the area where they committed their crimes, Garrett said, because \"they feel comfortable that they're not gonna get caught.\"
\"This particular killer, he's on a remote trail -- if he believes that nobody else saw him actually harm these two girls, then in his mind, he feels like he's home free,\" Garrett said.
\"He's going to be somebody that is pretty good at keeping his mouth shut. That doesn't mean somebody doesn't know something, but he's been very good at maintaining his lifestyle,\" Garrett continued. \"Some killers have an innate ability to do that ... it goes with criminals' ability to place their life in boxes -- commit these crimes, do awful things, continue on their normal life.\"
Walsh said it's likely the killer is \"very close to the investigation\" and is likely \"trying to take the temperature of the investigators to determine what they know and how hot on his trail they are.\"
\"It's not unlikely he could have been a volunteer in the search\" for the girls that first day they went missing, Walsh added.
![\"PHOTO:](\"http://a.abcnews.com/images/US/ABC-Indiana-teen-murder-01-rc-170310_4x3t_384.jpg\")
Officials also said a car was left in the parking lot of an abandoned building in Delphi on the afternoon the girls were killed.
Police are now looking for anyone who can provide descriptions of cars in the lot at that time.
The building has since been demolished and the lot is empty, police said.
Carter did not elaborate on the car's involvement in the case. But Garrett said he believes investigators either just learned about the car recently or were unable to find the driver.
\"Maybe this car has taken on a different significance in this investigation,\" he said.
In 2017, police released a grainy image of someone seen on the trail the day the girls went missing along with a chilling recording found on Libby's phone with just three words heard: \"Down the hill.\"
![\"PHOTO:](\"http://a.abcnews.com/images/US/HT-indiana-suspect-floating-cf-170216_4x3t_384.jpg\")
On Monday, state police released new audio and video footage from Libby's phone.
The brief video clip shows the suspect walking on the bridge near where the girls were last seen.
\"When you see the video, watch the person's mannerisms as they walk,\" Carter said Monday. \"Do you recognize the mannerisms as being someone you might know?\"
It's hard to decipher what the suspect says in the new audio clips.
\"The person talking ... is the person on the bridge with the girls,\" Carter told reporters. \"Please listen to it very, very carefully.\"
Garrett said he doesn't understand why state police waited two years to release the additional footage.
\"The critical window many times in catching people quickly is to release as much evidence as you can that won't compromise the case -- maximum amount of video, maximum amount of audio that you can get out there to trigger somebody to come forward,\" Garrett said. \"That's how you get really good tips.\"
![\"PHOTO:](\"http://a.abcnews.com/images/US/ABC-Indiana-teens-murder-18-rc-170310_hpEmbed_4_17x15_384.jpg\")
But to Walsh, the delayed release of the video and audio helps keep \"the community invested in this crime.\"
\"And if anybody out there who did know anything and maybe it's weighing on their conscience, they're seeing it out there again and they're getting a reminder that they need to do the right thing,\" Walsh said.
Walsh thinks Monday's press conference was an appeal to the community in hopes that more eyewitnesses will come forward.
\"People sometimes think their tip may be insignificant so they don't say anything -- but it can often be the key that unlocks the door to justice,\" he said.
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