who is your first witness? what is it you need to prove? >> luis montero was the first witness. and he was there to say he saw johnny at the time the crime took place, and johnny wasn't there. how long had you known mr. hincapie? >> maybe a year, give or take. >> montero testified he was also on the subway headed to the dance club. >> what was your relationship with mr. hincapie like? >> we knew each other, but we didn't know each other that good. >> in fact, they hadn't seen each other or spoken since then. to understand montero's story, it's important to understand how the subway station is laid out. the platform level is where the trains come in and where the crime took place. one long flight up from the platform is what's called the turnstile level. and then a final set of stairs gets you to the street. montero says that hincapie was