Investigation of modern criminal crimes (blackmails, robberies, kidnappings, murders, thefts) has revealed that criminals stalked their future victims, using the traditional methods of tracking. They found out the routes of movement, determined the amount of guards, time of work, rest and etc. To conduct surveillance independently is very difficult, and at times even impossible. The best way to get rid of the pursuers is to appeal to professionals. Our detective agency provides such services. We also investigate different circumstances and phenomena, unveil unknown facts and help in those cases, where detectives' assistance is required. For example, we can refer to private investigation of minor cases, which militia do not embark and are classified as of «little importance».