turned police in auburndale say a man was killed over the weekend after meeting someone on the site plentyoffish. josh cascio has a warning from police now, and it's so many people that use these sites, josh, i guess they need a warning. >> reporter: this shouldn't be a huge shock to anyone. you're still meeting a stranger for the first time, and let's face it, not everybody on the internet is who they say they are. we should know that by now, right? unfortunately, that's what 27-year-old adam hillary found out. police say he went on a only to wind up dead and robbed. now, four people are under arrest in that case, but it's not the first time we've seen dating sites and apps lead to bad things. so here are a few tips. number one, always do your research on who you meet. google them and check your facebook page and stalk them online for lack of a better term. two, meet in a public place. somewhere a lot of people are around. never in a private location. three, and this should go of course, always have a plan. >> in real life as opposed to talking to them online, you want people to know where you