The 19-year-old's body was found on a dairy farm in Adams County on December 28, almost 26 hours after she was reported her missing in Broomfield.
That man had nothing to do with the murder, McIntosh said.
Bollinger had been missing since December 28, when she left home around noon and never returned. "So, looking through all of that data, conducting numerous interviews, we were able to develop and identify Joseph Lopez".
"As you can imagine, a 19-year-old's social media or phone - there's a lot of data there", he said.
Natalie BollingerAdams County investigators used social media and phone data to find the man suspected of killing a Broomfield teenager and leaving her body in a wooded area at the edge of Thornton on December 29.
But the suspect, Joseph Michael Lopez, says the woman hired him to kill her after he answered her Craigslist ad.
According to court documents, investigators found more than 100 text messages between Bollinger and Lopez from the night Bollinger was reported missing.
"Regardless of whether she requested help, if he's the person who pulled the trigger, it's still murder", Beller said.
He added that he pretended to be a hitman and began speaking with Bollinger, eventually killing her with a gun she purchased, according to the report. They then drove around while discussing how he would be paid.
Lopez told detectives that "he was pretty sure that he knew what we were there for", and that "he was sure it had to do with the girl he talked to on Craigslist", according to the affidavit.
Natalie Bollinger's body had a lethal amount of heroin in it when she was found. Lopez then said he closed his eyes as he fired a single shot.
The affidavit does not include any evidence of Lopez's claims or how much heroin was in Bollinger's system.
Family and friends had told police that Bollinger had a history of suicidal thoughts but others said she seemed happy of late.
He said a weapon was found "around" Lopez, but investigators have not been able to link it to Bollinger's death.
Lopez continued on to explain how he came across a freaky post on the classified ads website while he was combing through the "Women seeking Men" section.
During the investigation, investigators questioned a man whom Bollinger accused of stalking her before she was killed. When I told him I didn't want to see him anymore, he sent me hundreds of texts and calls, ' she posted.
Bollinger was shot and killed.
Police have since dismissed Schwartz's involvement.