All Cases, Investigative Services (ACIS)

Private Investigator - Detective     
Ontario | Riverside | San Bernardino | Los Angeles 
Bring the Truth to Light
with ACIS Detectives
We give clients Free Consultation 24/7
Office Hours:

9:00 a.m.–10:00 p.m.

Office Hours:
10:00 a.m.–7:00 p.m.

Toll Free: (866) 920-2620

Service Area:
Southern California: Ontario, Murrieta, Monterey Park, San Bernardino County, Orange County, Los Angles, Riverside, Ventura
California Association of Licensed 
Investigators, Since 2007
ACIS Services Links:
Missing Person Infidelity  Surveillance Skip Trace-Locates Process Service Asset Recovery Bank Account Locate 
Blog GPS tracking Surveillance
• Missing Person • Infidelity • Surveillance
• Skip Trace-Locates • Process Service
• Asset Recovery • Bank Account Locate
• Blog • GPS Tracking

Background Check -Southern California Private Investigator

Private Investigator
Background Checks 

Running a background check is often one of the best investments a person or business could ever make when you consider the alternatives of damages or loss from theft.  Nothing is more important than knowing you've hired the right person for the job. Our Southern California private investigators at ACIS can assist with background checks.  When you've got your ideal candidate for a position in your company, a simple phone call just won't do. You need to have his or her background professionally evaluated to minimize the risk factor in your hiring decision.

Our pre-employment background check will put your mind at ease We offer a full menu of screening services, including:

  • Previous employment
  • Criminal record
  • Driver's license
  • Professional affiliations
  • Education
  • Verification of Social Security Number
  • Substance abuse
  • Assist with I-9 Audits
  • Employment Eligibility 
  • Homeland security

Don't leave the future of your business to chance. Contact us today, and we'll be happy to arrange for pre-employment screenings for all your top candidates.

Prevent Loss, theft, and Reduce Liability 

At ACIS in Southern California, we have run background checks for many people who have been so glad that they took the extra step.  We have discovered sexual predators and even stopped a client from hiring an employee that went from company-to-company filing fictitious law suits.  

In a business environment, background checks can prevent what could be a potentially disastrous liability by being fully informed of clients that you do business with, employees background, or due diligence on businesses investments.  A background check with ACIS private investigators will expose the risk and unveil criminal history.  Our comprehensive background checks are easy and affordable ways to reduce risk of a devastating crime or loss.  Find out more contact ACIS and ask about our offer for a fast comprehensive background check.  

Want to know more before dating?

At ACIS in Southern California, our private detectives know that no one likes to think that all people are cheaters or liers.  If you met someone new that your are considering for dating or possible relationship, a background check could be the best investment that you made.  The signs of cheating are present at the start ... don't ignore the warning signs. Whether you need to know the truth about someone that you just met or want to validate your suspicion of your current partner.  We can help you get the information you need and bring you a peace of mind.  You can count on our licensed, professional investigative team to conduct a discreet background check for you. 

Our private investigation services include a full range of techniques, including cheating spouse and infidelity investigations:

  •         Searches of hidden assets
  •         Vehicle tracking
  •         Electronic surveillance - photographic and eavesdropping
  •         Computer activity - chats, emails, and websites

If you desire, we can also reveal the identity of the person involved in your spouse's infidelity.

When you need to know, you can trust us to give you the truth. Contact us today for an appointment - we're here to help.


Child Care - Nanny Investigation

If you have children, a background check on the babysitter is essential to protect them from danger and abuse.

In case of a divorce or separation, our private detectives in Southern California can make sure that the people involved with child care are safe.  A parent or court may order a child custody investigator to check on the spouse's activities during visitation and custody visits.  Investigations of parents most of the times reveal suitability for child custody;however, there are times when there are unfavorable findings such as chronic neglect, child abuse, or parental alcoholism or drug abuse is detected and brought to the attention of the client and the court.  If you need to know, ACIS private investigator or qualified child custody investigator can tell you the truth and could save your child’s life.

How does a child custody investigation work?

Our private detectives at ACIS may use surveillance in child custody cases to determine what happens when a parent is with the child. Investigators can document or video tape any abuse or neglect that they see and they can gather other evidence that suggests whether the child is being treated well or not. Investigators also question the parents and ask parents to fill out a detailed questionnaire about their parenting and the child. Additionally, investigators may speak to witnesses or may solicit witnesses for the court on behalf of the parents.

 Investigators at ACIS can find out whether a parent indulges in reckless driving, criminal activity, alcoholism, neglect, or other activities that may affect a child's welfare. Based on the information and evidence gathered, parents and courts can determine what to do to ensure the child safety. A private investigator’s findings always have more credence in court than a parent’s accusations, so if you have any suspicions, a qualified professional investigator is essential.

ACIS Private Investigators Service Areas


Alhambra Burbank Downey Hawaiian Gardens Long Beach Riverside
Altadena Carson El Monte Hollywood Murrieta San Bernardino
Anaheim Chino El Segundo Hemet Montebello Van Nuys
Baldwin Park Costa Mesa


Inglewood Pasadena Upland
Buena Park Culver City Glendale Newport Beach Santa Ana Temecula
Brentwood Del Mar Glendora Long Beach Tustin West Covina
Bell Gardens Diamond Bar Hawthone Laverne Rancho Cucamonga Santa Ana