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

Welcome to ACIS Private Investigator - Lake Arrowhead, CA

Private Investigation Services

At ACIS private investigation in Lake Arrowhead, we are a full service private investigation agency serving businesses, law offices, and private individuals in Lake Arrowhead, Big Bear, and the surrounding communities. Our private investigators are on call and available for consultation 24/7. We specailize in all areas of private investigation such as, surveillance, matrimonial & infidelity, child custody, people locate & missing persons, background checks, undercover operations, GPS monitoring (vehicles, packages, people), fraud, stalking, copyright, trademarks,  and intellectual property rights investigations.  We will conduct your investigation discreetly and with the utmost confidentiality. We are licensed by the California Bureau of Security and Investigative Services ("BSIS") to transact business as a private investigation firm and are licensed bonded and insured. All investigators have prior law enforcement background. Call us if you need help. We will meet you anywhere of your choice to discuss your case privately. There is always a free consultation.

Infidelity - Cheating Private Investigation

At ACIS investigations in Big Bear, Lake Arrowhead, and surrounding communities, we know that no one likes to think that a spouse is being unfaithful - but sometimes, the signs are too hard to ignore. Whether you need to know the truth as part of divorce proceedings or you just want to validate your suspicion just for a peace of mind, you can count on our licensed, professional investigative team to conduct discreet surveillance of your spouse.

Our infidelity private investigation services include a full range of techniques, including:

  •         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.


Background Checks 

Background Investigation Services Nationwide

Nothing is more important than knowing you've hired the right person for the job. 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
  • Substance abuse
  • 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.

Call us at 909- 278-0059

Child Custody Investigation

If you have children, a child custody investigation can protect them from danger and abuse.

In case of a divorce or separation, child custody investigation can help make sure that the child involved stay safe. A parent or court may order a child custody investigator to determine what the child’s experience is like with a custody or non-custody parent. Investigations of parents sometimes reveal chronic neglect, child abuse, or parental alcoholism or drug abuse. At ACIS Detectie agency, we could assist with a child custody investigation. If you need to know, a private investigator or qualified child custody investigator can tell you the truth and can save your child’s life.

How does a child custody investigation work?

Our child custody private investigator in Lake Arrowhead may use surveillance to determine what happens when a parent is with the child. Investigator 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.

Our private investigator in Lake Arrowhead 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 Riverside Private Investigators Service Areas

Alhambra Burbank Downey Hawaiian Gardens

Moreno Valley

Altadena Chino El Monte Hollywood Murrieta San Bernardino
Azusa Chino Hills El Segundo Hemet Montebello San Jaciento
Bloomington Corona


Indio Menifee Sun City
Banning Culver City Glendale Lake Elsinore Ontario Temecula
Brentwood Del Mar Glendora Palm Springs Norco West Covina
Bell Gardens Homeland Nuevo Perris Rancho Wildomar