A Colorado man who told police he shot a teenager in the head after she hired him to kill her via a Craigslist ad pleaded guilty to second-degree murder Monday as part of a plea agreement with prosecutors.The agreement allowed Joseph Lopez, who had been charged with first-degree murder, to avoid a possible life sentence for 19-year-old Natalie Bollinger맥스카지노�s death. Bollinger맥스카지노�s body was found in a wooded area north of Denver in late December, one day after she was reported missing.Adams County District Judge Roberto Ramirez sentenced Lopez, who is 23, to serve a maximum of 48 years in prison.According to court records, Lopez told police that he responded to a Craigslist ad titled 맥스카지노�I want to put a hit on myself맥스카지노� and said Bollinger asked him to shoot her. Lopez told investigators he came upon the ad while looking at the 맥스카지노�women seeking men맥스카지노� category, according to documents obtained by KDVR.Lopez told police he tried to change Bollinger맥스카지노�s mind when they met but eventually he parked the car they were driving in and he shot her.Lopez said Bollinger 맥스카지노�knelt down on the ground and that he knelt down along her left side and slightly in front of her.맥스카지노�He said they said a prayer together before pulled the trigger. Lopez then left the scene with the teen맥스카지노�s purse and the gun, which he claimed she provided. The affidavit stated Bollinger had a history of heroin and methamphetamine use. At the time of her death, the teen had a 맥스카지노�potentially lethal level of heroin in the blood.맥스카지노�맥스카지노�Prosecutors said Lopez should have called 911 or found help for Bollinger after he saw the ad. Bollinger and Lopez texted each other dozens of times before he picked her up and they drove around for 맥스카지노�an extended period맥스카지노� before he killed her, they said.맥스카지노�He didn맥스카지노�t respond as a human being,맥스카지노� Chief Deputy District Attorney Ally Baber said. 맥스카지노�He responded as a predator.맥스카지노�During his interview with investigators, Lopez mentioned that he kept a journal in high school in which he wrote stories about kidnapping people, torturing them and executing them, according to the Denver Post.An autopsy report found that Bollinger died of a single gunshot wound to the head. Some of Bollinger맥스카지노�s family members objected to the plea deal during Lopez맥스카지노�s sentencing hearing. Bollinger맥스카지노�s father, Ted, told KMGH-TV that the prosecutors맥스카지노� agreement with Lopez felt like 맥스카지노�spit in my family맥스카지노�s face.맥스카지노�맥스카지노�There맥스카지노�s no justice in this,맥스카지노� Ted Bollinger said.At the sentencing, Ted Bollinger described his daughter as an artist who loved nature. "You took advantage of my daughter," he said. "She was vulnerable and drugged... You premeditated. Brutally shot and killed my baby. I asked for an eye for an eye. You have been protected. The Bollinger family had no say in this. This is a deal with the devil."