collin and caitlin's relationship hit the brakes after three years, and he struck up a romance with mo wilson after the two competed in a bike race. but the competition grew fierce after both women believed collin was theirs. a chance encounter between the women left mo confused and caitlin furious and shaking in anger, telling a police informant that she wanted to kill wilson and that she had either recently purchased a firearm or was going to. then, after learning mo was visiting austin and spending time with collin, caitlin stalked her on a sports app, waited until mo was alone at a friend's apartment, and shot her multiple times with a nine millimeter handgun. >> my friend is staying with me and i just walked in and she's laying on the bathroom floor and there's blood everywhere. >> there might be a police officer coming in soon. that's okay. don't leave her alone. and don't stop. seven eight. don't stop cpr unless that officer takes over for you. okay? keep the line open for me when they come in. >> newly released body cam video shows the moment police arrive at the tragic scene where mo