Police will only investigate activity that violates state criminal law, so  find your state's law that applies to criminal fraud and make sure it applies to your case.  Specifics differ from state to state, but generally the person must have lied or misrepresented an important fact to induce you into providing him with money or some other benefit. For the crime of fraud, the prosecutor must prove beyond a reasonable doubt that the person knew the information he was stating was false, but lied anyway to realize an unfair gain.  For example, one common Craigslist scam involves fake rental listings. The criminal finds a home for sale on a real estate site and copies the information for a Craigslist ad, using his own email address. When interested would-be renters contact him about the listing, he explains that he has had to leave the U.S. quickly – often because of some sort of missionary or other work in Africa. He then instructs the person to wire a deposit of first and last months' rent overseas. Of course, the home is not available for rent and the person who wired the money will probably never hear from the supposed "landlord" again. With a basic understanding of what must be proven to prosecute fraud, make copies of any emails or other information you have that could be of assistance to police and prosecutors.  Since the person is trying to trick you, it's likely they've given you a fake name or are using a dummy email account. However, you still should keep records of all correspondence and any information you've received over the course of the transaction. Keep in mind that fraud essentially is theft by deception, so proving the intent to deceive is crucial to any fraud case. If the person didn't know the information they were giving you was false, they may not be liable for fraud.  For example, suppose you respond to a Craigslist classified ad posted by someone offering to sell her 2005 Volkswagen Beetle for $8,000. In the listing, she states the vehicle has no mechanical problems. However, after purchasing the car you take it to a mechanic and discover the transmission is blown. The seller isn't guilty of fraud unless it can be proven that she knew the car needed a new transmission and intentionally lied about it to get more money from you for the car. Go to your nearest precinct or call the non-emergency number to report the fraudulent activity.  In some areas, you also may be able to fill out an online form to file a police report. Contact information for all local law enforcement agencies in the United States is available at http://www.usacops.com. When you give your report to the police operator or officer, include a detailed, chronological description of all events or communication that took place between you and the perpetrator. Provide as many details as you can and make any documents you have such as copies of email correspondence available to the department. Once the official report is completed, ask for copies and take down the report or reference number in case you need them for other reports. If you are filing an insurance claim or need to report a financial loss to a bank or credit card company, having a police report number can be valuable. As the police investigate the activity, you may need to provide further information to them about the listing or your interaction with the person. Retain the originals of any documents or electronic files in case investigators need to inspect them or use them as evidence. If you have emails with the perpetrator, you should keep the original files intact, if possible, since emails contain header information that can be used to trace the location of the sender.
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One-sentence summary -- Research your state's law. Gather information about the incident. Contact your local police department. Get a copy of the police report for your records. Cooperate with investigators.

Article: A person isn't going to jump to be your best friend if you don't seem willing to put work into the friendship. Great best friends are there when you need them. Make sure you are there for the people around you and spend time with them when you can. Showing that you are truly interested in their happiness and well-being will make them see that you are a true friend. This could mean sending texts to check in, bringing them soup when they aren’t feeling good, offering your time when they need help, and opening yourself up to them. It may make you feel vulnerable doing this, but it increases your chances of finding a best friend. People generally like to talk about themselves. This isn't done in an arrogant way--it's just how they best relate to others, through their own stories. Find out all you can about potential friends. Show interest in them by asking questions that get them talking. Ask questions like, “What’s your favorite thing to do?” “Why did you choose this career path?” or “Who is the person who influences you most?” Asking different questions like this allows you to get to know them on a personal level and opens up the beginnings of a great friendship. It’s difficult to maintain a relationship with someone you don’t see. You also may make them feel like they aren’t worth your time if you don’t see them often. Do what you can to share your time with them and they will see that you think they are worth the effort. Although going out and attending events together is fun, you don’t always have to do something. Just being in the same room together and chatting about what is going on with your life is often more fulfilling. Part of being a good friend is acting as a cheerleader. You have the ability to make others feel good about themselves, and this is something you should take on for your friend. When you are able to lift up their spirits and support them, they will likely be grateful to you and your friendship, which can allow it to become stronger. What makes a best friend stand out from other friends is your ability to share anything with them. Best friends have secrets that are kept between them. You can show your capacity to be a best friend by being honest with your friends and keeping their secrets.  If a friend tells you something, don't share it with anyone else. Unless, of course, your friend is in danger, you should keep your lips zipped. Trustworthy people are also honest. If your friend asks you a serious question, tell the truth, even if it hurts. For instance, if a close pal asks, "Do you think I should go to second-base with Josh?" Show your concern by saying "I think you should wait until you're sure he really cares about you."
Question: What is a summary of what this article is about?
Be available. Act interested. Spend time together. Make people feel good about themselves. Demonstrate trustworthiness.