3 We're learning new details about the killing of a Metro-P-C-S employee who was murdered on the job this past Saturday evening. Police say they have caught the man who did it. the sheriff's office says he goes by the nickname "killer". 21-year-old James Rhodes is charged with the murder of 20- year-old Shelby Farah. Channel 4's Vic Miccolucci is joining us LIVE from downtown with more on how police caught Rhodes. 3 3 3 VIC LIVE IN: Police say they're relieved such a dangerous man is off the streets.They had really been putting a lot of hours into solving the case ...and the break they needed came yesterday when James Rhodes's own family tipped detectives off. :00-:06:07-:111:33-1:40 56:31 "The family was basically closure.You've got family members coming in and they're scared of him, saying 'Hey, it's him, he did it.' It was the icing on the cake right there." JSO detectives say 21-year-old James Rhodes's family did the right thing. Police had already been working a series of tips...but say when his own family came to them yesterday afternoon, it sealed their case. A team of officers arrested Rhodes shortly afternoon at a bus stop on Atlantic Boulevard. They questioned him for hours. 55:23 "At first denying all accountability to it, and then finally in the early hours this morning he made a confession that he did it." Rhodes is charged with killing 20-year-old Shelby Farah, a college student, mentor and volunteer. She was the manager of the Brentwood Metro PCS store. Police say Rhodes killed her in cold blood. 54:31 "He pointed the gun at her demanded the money, she cooperated, she was doing what he asked and once she handed him the last bit of money, he fired three rounds, killing her." The arrest came 3 days after the murder. Channel 4's Crime and safety analyst Ken Jefferson says JSO did a great job in solving it so quickly. 27:19 "When they dig their nails into the sand, they can get the results that they want." This video shows who police say is Rhodes right before he committed the heinous crime.Jefferson says it played a big part in the arrest. 28:01 "it helped the suspect's relatives identify him from the video and help turn him in, but also, it showed the suspect himself that the entire city is looking for you and there's nowhere you can hide." 3 QUESTION: What is Rhodes's criminal history?