For starters then-DeKalb County Sheriff’s detective Jeremy Taylor, was the lead investigator on the case with no prior homicide investigation experience.
He conducted a two-month investigation and concluded that Agee fell from a cliff into the lake and either died from the fall or drowned, reported Fox 17. 
His report detailing his findings was just three paragraphs long. – He was deposed as part of a lawsuit this summer, admitting that he failed to talk to witnesses or look for DNA or blood evidence

The friends always denied any involvement in Agee’s death and were never charged with any wrongdoing.
As part of that lawsuit, Smith’s lawyers deposed detective Taylor in June 2018, forcing him to detail his investigation into Agee’s death, revealing the gaping holes in the case.
During the videotaped deposition, the now-former detective admitted that he did not listen to 911 calls reporting the discovery of Agee’s body, nor did he interview the people who had made those calls.
When asked why he did not talk to the callers, Taylor replied: ‘I just didn’t.’
The ex-cop also said he did not know when Agee was last seen alive and he did not attempt to speak to the residents of houseboats that were docked not far from the spot where her body was recovered by fishermen.

When asked if he looked for blood evidence on the rocks at the campsite, he replied with a bowed head: ‘no, not specifically, no.’
Agee’s family hired a hydrologist who determined that if the young woman fell from the cliff where she and her friends were camping, like Taylor’s report claimed, it would have been impossible for her body to float against the current to the cove where her body eventually ended up.
During the deposition, former detective Taylor admitted that he did not factor in the direction of the current during his investigation and did not think to bring in a diver to look for evidence in the lake.
‘I didn’t. I just didn’t,’ he said.
Taylor admitted that he had never worked a homicide case and had no training in homicide investigation.
He said he made no attempt to collect potential DNA evidence from under Agee’s fingernails and did not request a rape kit because the victim was supposedly on her period at the time of her death.
After watching the recording of Taylor’s deposition, Agee’s mother said she was ‘shocked’ by his answers.

‘There is no way that was an accident, I will go to the grave believing that girl was killed, her body was moved and they are hiding the truth,’ Yarchuck said.
Agee’s friends told police they were all drunk when they returned to the campsite and Agee fell asleep in a hammock close to the cliff edge with Stout.

Her friend Palmer did tell police she was worried because Agee’s flip flops, phone and wallet were still at the campsite. Palmer said she went looking for her friend, presuming she would run in to her at the lake.
But the family’s private investigator Sheila Wysocki claimed autopsy photos show a strange bite mark near the young woman’s breast and that Agee had bleeding in her throat suggesting strangulation.
In March 2017, a judge dismissed Smith’s wrongful death lawsuit against her daughter’s friends, ruling there was insufficient evidence.
Dekalb County Sheriff’s Patrick Ray conceded in July 2018 that former detective Taylor could have gathered more information, but he refused to say that he should have done so.