mr. nissim to the house for revenge. >> reporter: listen to the d.e.a. said prosecutor abbe rifkin to the jury, to hear not a victim, but a calculating, cold-blooded killer. >> so when i knew that it was gonna be hard to catch him, i was like "i have to do something." >> reporter: what did she do? she bought a gun, and then, prosecutors said, she invited nissim to her home. miami dade county medical examiner, dr. emma lew, demonstrated the path of bullets from cindy's gun into nissim's body. five shots, mostly in the back. >> gunshot wound "a" was on the right upper back. >> reporter: the day cindy shot nissim he wasn't even armed. and if she was as frightened of him as she claimed to be then how to explain this? phone records that showed the two were in constant contact. thirty times in the weeks after orlando was killed. >> we're talking about somebody who was clearly having a relationship with this person. >> reporter: well, come on. that's a pretty thin thread, clearly having a relationship. i mean, that's your speculation, truly to god -- >> absolut