Wichita ? The man accused of killing a 14-year-old Great Bend girl does not want jurors at his capital murder trial to hear evidence of his relationship with the teenager.

Attorneys for Adam Joseph Longoria, 37, filed a motion Friday in Barton County District Court asking the judge to prohibit prosecutors from presenting such evidence, saying it is immaterial to the case. The defense contended the testimony is nothing more than a “blatant attempt” to prejudice the jury.

“If the proffered testimony were admitted, the speculation and conjecture would so prejudice Mr. Longoria as to deny him his constitutional right to a fair trial,” his attorneys wrote.

The defense filing came in response to a notice that the state plans to introduce evidence that Longoria became “obsessed” with Alicia DeBolt after meeting her at a birthday party.

The missing girl’s charred body, with traces of duct tape on her ankle and face, was found last year at the Venture Corp. asphalt plant where Longoria worked southwest of Great Bend.

Longoria faces amended charges of capital murder, attempted rape and criminal solicitation of a minor. A new preliminary hearing on revised charges is set for Oct. 5.

The state alleges Longoria’s “fixation” with Alicia started July 17, 2010, when he met her at a birthday party for his live-in girlfriend, Eva Brown. He then saw Alicia again the following night.

“He began to woo Alicia by fawning over her and providing her with mixed alcohol drinks. He wanted Alicia to be ‘his girl,'” prosecutors wrote. “When another male took her home at the end of the party, the defendant became upset, later accusing this individual of blocking his attempts to have sex with Alicia.”

Longoria and Alicia began texting July 18, 2010, exchanging 55 messages that day, the state contends. The then 36-year-old Longoria, who claimed to be 25, reportedly called Alicia “miss shy” and “hot stuff” and asked her to send him a picture, which she did. He also reportedly offered to pick her up and take her out multiple times.

The state’s motions also said Brown entered into a “texting war with Alicia” and asked her to stop talking to Longoria. When Alicia asked Longoria if he was dating Brown, he allegedly replied, “No ex.”

Prosecutors allege Longoria attempted unsuccessfully on four previous occasions to get the girl in the car with him.

“On August 21, 2010, the defendant’s depraved fantasy came true,” prosecutors wrote. “He started to text Alicia at 9:46 p.m. He lured Alicia into his vehicle, took her to an isolated area, attempted to rape her, and killed her.”

The state argued that the nature of the relationship between Longoria and the girl tends to prove the identity of the person who killed her, arguing that makes the evidence admissible at his trial.

In their response, his defense attorneys contended that what the state is actually seeking is to prejudice Longoria by painting a picture of him as someone who was obsessed with Alicia.

“It is important to note that this ‘obsession’ is nothing more than the opinion of the state based upon their interpretation of selected events, some of which don’t even entail Mr. Longoria,” his attorneys wrote.