In Miami, Florida, thieves are using cutting-edge technology to steal the frequency from car key fobs to steal vehicles. NBC News’ Sam Brock takes a closer look at the brazen crimes and what to do to protect yourself. Tune into Top Story with Tom Llamas weekdays at 7 p.m. on NBC News NOW. Top Story Playlist:    • Top Story with Tom Llamas   NBC News NOW is an online streaming network from NBC News where users can find the latest stories and breaking news on world news and US news. » Subscribe to NBC News: http://nbcnews.to/SubscribeToNBC » Watch more NBC video: http://bit.ly/MoreNBCNews NBC News Digital is a collection of innovative and powerful news brands that deliver compelling, diverse and engaging news stories. NBC News Digital features NBCNews.com, MSNBC.com, TODAY.com, Nightly News, Meet the Press, Dateline, and the existing apps and digital extensions of these respective properties. We deliver the best in breaking news, live video coverage, original journalism and segments from your favorite NBC News Shows. Connect with NBC News Online! NBC News App: https://smart.link/5d0cd9df61b80 Breaking News Alerts: https://link.nbcnews.com/join/5cj/breaking-news-signup?cid=sm_npd_nn_yt_bn-clip_190621 Visit NBCNews.Com: http://nbcnews.to/ReadNBC Find NBC News on Facebook: http://nbcnews.to/LikeNBC Follow NBC News on Twitter: http://nbcnews.to/FollowNBC #TopStoryWithTomLlamas #Robbery #Cars