Testimony and interview footage on Day 3 of Tanner Horner's capital murder trial pulled back the curtain on key evidence presented to jurors. 

Jurors heard new details about how investigators found Athena Strand, including testimony that she was found unclothed and that items of her clothing were later recovered.

There was a high level of detail in how investigators built this case, from recovering out‑of‑state video from the FedEx vehicle contracting company to using cell data to pinpoint locations. 

"We did a geofence for T-Mobile," Taylor Paige, a special agent with the FBI in Dallas, testified. "That device became of interest for us. Secondly, there was a phone number from Mr. Horner that was also identified and became more relevant as Command Post started to unfold."

Prosecutors also examined Horner's home and personal life.

In the video shown to the jury, he shared with investigators that he lived with his fiancée in a shed, just steps away from the main home where his mom and grandmother lived. Photos shown in court revealed the area behind that shed, where investigators began focusing their search — and where they say key evidence was found.

Investigators documented items of clothing, including a pair of children's underwear and socks, and blue jeans — items that matched what Athena was wearing the day she disappeared. When asked why he removed her clothes, Horner allegedly said it was for "humiliation," that he thought it was "funny."

When investigators pressed Horner on motive, he said that stress was "getting too much" and insisted he's "not a bad person" who has "done the right thing" his whole life, describing Athena as being in the "wrong place at the wrong time."

Horner cites "Zero," mental health struggles

Testimony also highlighted Horner's shifting behavior: at times discussing his family, but when pressed about his actions, he deflected blame onto "Zero" and avoided accountability.   

Horner described "Zero" as a "little devil on my shoulder," saying it developed more recently and often blamed "Zero" for his actions. According to court testimony, Horner repeatedly separated himself from the crime, saying, "I didn't do this, but he did," referring to "Zero."

He also said that he felt like events were a "bad dream" or "nightmare," referencing confusion, memory gaps, and comparing it to PTSD. At one point said he was "in trouble for something I don't remember."  

When asked if he had told investigators everything during an interview, Horner responded, "It's not Zero, it's Tanner," but continued describing the situation as if he were "in the backseat watching it happen," a pattern investigators point to as Horner distancing himself and deflecting responsibility. 

Testimony also revealed that Horner attempted self-harm in jail and tried to hang himself while in custody. At one point, Horner asked investigators to shoot him and referenced harming himself.

In May 2023, Horner attempted suicide while in the Wise County jail, and he referenced prior suicidal ideations.

Horner's attempts to "cut a deal"

Testimony revealed that Horner at one point attempted to "cut a deal," while investigators continued questioning him. 

Horner asked for an ankle monitor and to spend Christmas with his family in exchange for telling the truth; investigators told him no promises or guarantees could be made. He also told investigators that his main reason for talking is to see his son, repeatedly emphasizing wanting "one last Christmas." 

Horner said he had been off medication, emotional, and crying, and that he's "hurting for her and her family," but continued circling back to negotiating a deal.

Horner pleaded guilty to capital murder and aggravated kidnapping just moments before the trial began Tuesday. Despite his guilty plea, Horner still faces the death penalty as the punishment phase continues.