I hired an American who refused to supply me any documentation beyond a copy of his passport where he had redacted certain parts. He spun a story of how he deserted his unit in Iraq due to orders he didn't agree with and didn't want them to find him (super suspicious), so I fired him. He started threatening to kill me and at one stage tried to drive me off the road and split up my family. Local police were useless when I went to see them so I started researching the guy which was difficult as he was using a stolen ID/passport and a very common name. Turned out that he was wanted for a string of crimes in various states and was facing trial for the rape of a 5 year old. He faked his death and assumed the identity of another man (I cracked it by tracking down the real guy and he knew the perp as they had worked together in the past). I went to the US embassy with the details and was interviewed by a CIA agent who then said it was a federal issue and would fall under the US Marshalls or FBI. It took months for the FBI to eventually contact me. I had to go back to the embassy and presented everything including a working cellphone number for him and the exact location he was staying at. They ran the photos through a facial recognition system along with his mugshots from various arrests and said it was inconclusive even with the guy whose identity he stole on a conference call with us telling them exactly who the guy was. Things went quiet from there. The guy moved from that location and got a job at a school in another town. Again I contacted them with his location and told them that he is working with children. Nothing but crickets. About a year later he threatened me again. So I sent all of the info to the local newspapers in the county where he had raped the 5 year old. Things blew up from there and loads of people called the newspapers saying that he was definitely the correct guy. I also informed a child protection place that he was working at a school. All the media attention got the US District Attorneys' office involved and only then did the FBI proceed with helping the local police make the arrest (before that there had been zero communication between them and the local police).