Prosecutors claim to have audio, recovered from the suspect's cell phone, in which Perez is heard saying, 'I don't want to die'

'I Don't Want to Die': Boyfriend Allegedly Filmed Rape and Murder of 15-Year-Old Girl Found Under Sink

Disturbing new details have emerged in the alleged rape and murder of Karen Perez, the Texas teen whose remains were recovered from an abandoned apartment building in South Houston, Texas.

During a hearing on Wednesday inside the Harris County Juvenile Detention Center, prosecutors revealed Perez’s teenage boyfriend – who has been charged with her death – allegedly used his cellphone to record the 15-year-old’s final moments.

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A spokesman for prosecutors tells PEOPLE investigators were able to access a two cell phones used by the alleged suspect, recovering damning text messages and audio files from both devices.

Officials are not naming Perez’s boyfriend because he is a minor and is charged as a juvenile.

Harris County District Attorney Devon Anderson told the court that one of the defendant’s phones contained text messages to Perez – who went missing on Friday after leaving her school – that demanded she skip classes with him. When she told him she couldn’t, he allegedly texted her that he’d kill her, Anderson said.

After Perez was reported missing, Anderson claims her boyfriend and his father set out to search for her. After driving around for a bit, “the defendant told his father to just take him home because she is not alive.”

Anderson said at Wednesday’s hearing that a second recovered cell phone was found in the abandoned apartment complex where volunteers discovered Perez’s body during an organized search Monday evening. Her remains were concealed beneath a sink, according to law enforcement officials.

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“The second cell phone contained a video,” Anderson said. “The video is completely black but the audio is good. You can clearly hear the defendant forcing the victim to have sex with him. He even calls her by name.”

Anderson claimed in court that the victim’s final pleas were also captured in the recording.

“You can hear the victim saying she does not want to do this,” Anderson explained. “You can hear the defendant choking the victim. You can hear the victim stating, ‘I don’t want to die.'”

According to Anderson, the suspect and two other males lured Perez to the deserted building, and that the sexual assault and strangulation occurred after the two other students returned to class.

After Perez died, Anderson said the suspect can be heard saying, “I told you.”