Newly released arrest affidavits reveal that the three teenagers accused of killing a 20-year-old Colorado woman after throwing rocks at passing cars returned to the scene of the crime and even took a photo of the victim's car as a “memento”. Joseph Koenig, Nicholas Karol-Chik and Zachary Kwak are charged with first-degree murder with extreme indifference, after hurling at least seven large landscaping rocks at passing vehicles, one of which went through Alexa Bartell's windshield, causing her death on April 19. Kwak allegedly threw the rock that killed Bartell. Following the incident, they returned to the scene and slowed down their car, so Kwak could take a picture of the victim's car. The next day Koenig and Kwak met up to “get their stories straight,” according to arrest affidavits. The teens appeared in court on Thursday for their initial hearing; they did not enter pleas and will be in court on May 3. The trio are being held without bail. It remains unclear which suspect threw the rock that killed Bartell.