Needing a private investigator in Diamond Bar CA?

There is no substitute for visual evidence! We have the experience and we get the results.


We strive to have the best private investigation firm in Diamond Bar and that is what we have achieved over the course of many years.. We have one focus, and one focus only: surveillance and research services surrounding Diamond Bar surveillance, and this is what we are the best at. Every single year we make the decision to invest thousands of dollars into the research of technology and then develop in-house technology not yet available to others in order to maintain our place as the most reliable firm in Diamond Bar. Then we use the technology to provide surveillance services that aren’t available from anyone else. Some of these unique technologies include: unique radio communication, unmanned cameras, motion detection cameras, unmanned cameras, and even unmanned aerial surveillance. We are firm believers that every case is different, and so each case deserves to be treated as such.


Our California Surveillance investigators go above and beyond when it comes to conducting Diamond Bar surveillance. We are far from the average private investigation firm, or even surveillance firm, and have grown past that level. Our Diamond Bar surveillance team knows Diamond Bar inside and out, but the investigators don’t reside within Diamond Bar’s city borders for the efficiency of your case. This is because we are able to perceive the requirement for great discretion and want to eliminate the chance of our investigator accidentally running into a familiar face, or worst case scenario, having any personal knowledge or acquaintance with the subject you wish to have investigated. This is all dedicated to conducting your case smoothly, to get you the evidence needed for a winning case.



private investigator in Diamond Bar



Our squad operating as Diamond Bar’s private investigators have become masters when it comes to anything related to domestic surveillance. Some of our surveillance can even lasts up to a few months, in the interest of securing your results.. We have also become aquatinted with many of the attorneys in the region and know how to work with the attorneys in Diamond Bar. Our one purpose is to get you and your attorney all the evidence necessary for a successful, winning case!



We try to use more creative methods in order to save you time and money. Our single most employed  tactic is unmanned surveillance. We are able to place many unmanned cameras for surveillance around Diamond Bar. In case you were curious about the pricing, 5 – 10 days of unmanned surveillance is the same price as a full day of normal surveillance.




O&O Investigations INC provides many private investigations in Diamond Bar, as well as any other city in California. If you find that you require a private investigator to assist you with a discreet and confidential private investigation please fill out one of our Private Investigator “Assign a case” forms. Our private investigators are completely committed to ensuring affordable, genuine service in Diamond Bar. We make sure all and any results are reported in a timely, accountable manner. To begin your case contact us today. We hope to hear from you soon. CA License #28111.


private investigator in Diamond Bar



Official Website of Diamond Bar

Website: http://www.ci.diamond-bar.ca.us/

California Association of Licensed Investigators

Website: http://www.cali-pi.org/

Professional Investigators of California

Website: http://www.pica-association.org/

The State of California Official Website

Website: http://www.ca.gov/

California Department of Consumer Affiars

Website: http://www.bsis.ca.gov/

California Legislative Information

Website: http://www.leginfo.ca.gov/

California Code of Regulations

Website: http://ccr.oal.ca.gov/


Diamond Bar is considered to be an affluent city in the Los Angeles County of California state. Diamond Bar gets it’s unique name from the “diamond over a bar” branding iron, which was registered in 1918 ( 70 years before the city was officially incorporated in 1989), by ranch-owner Frederick E. Lewis. As of the 2010 census, Diamond Bar has a population of about fifty seven thousand, which is approximately a thousand less than Diamond Bar’s population 10 years before in the year 2000. Diamond Bar was also the very first hydrogen fueling station to be built in the Southern region if California state.
Diamond Bar is considered to be a very residential city. Although most of Diamond Bar’s area is covered in residential areas, it also has quite a lot of area covered by a multitude of shopping districts and shopping malls. In retrospect, this leaves it as a more peaceful city to live in due to the absence of large corporate crimes that go unnoticed, or unreported. However that does not make Diamond Bar a utopian society, and there is still crime and still plenty of reasons to hire private investigators.
The private investigators that service the Diamond Bar region are highly qualified and reliable people. Diamond Bar is yet another city on the growing list that doesn’t have a personal private investigation sector residing in the cities borders. It still has a great multitude of private investigators willing to make the short trip to help investigate in the nearby Diamond Bar area. These private investigation organizations usually have at least 15 private investigators who are avaiable, even work located a small distance from their own place of residence. These private investigators come from cities such as: Glendale, Pomona, Los Angeles, and other cities that surround Diamond Bar. The private investigators who go to Diamond Bar from these cities are specialized in many services including: cheating spouse investigations, background checks, e-mail traces, injury and wrongful death investigations, criminal defense investigations, cases of fraud, and general fact investigating. Many private investigators who conduct work in Diamond Bar have over 15 years of experience, and usually even have at least partial experience dealing with hostile subjects. Diamond Bar private investigators can usually handle any civil litigation matters, no matter the problem. The private investigators in Diamond Bar have also been known to work along side with the police forces in Diamond Bar and other nearby cities.
Diamond Bar’s law enforcement isn’t residential, and the Diamond Bar area is served by the Los Angeles County Sheriffs Department. In order to keep Diamond Bar safe, the LA sheriffs department makes sure there is always at least twenty officers ready to serve the city in any emergency or crime situation that might require the presence of police officers in Diamond Bar. Due to the fact that their are only twenty officers dedicated to serving Diamond Bar, the LA Sheriffs Department sometimes hires private investigators to help with criminal investigations.

CA License #28111

Needing a Diamond Bar Private Investigator? Give us a call today!

Call Us At: (800) 959-0154


Text Us At: (424) 276-7785