Understanding the Digital Evidence Lifecycle
In today’s digital world, evidence that could help resolve workplace complaints may be gone before an employer realizes it is needed. From security camera footage to Slack messages, many forms of digital evidence can be lost quickly because of default retention settings, limited storage windows, or lack of proactive monitoring.
In this blog, we’ll explore the vital steps you need to take before a workplace complaint is filed to ensure you’re ready to preserve and collect digital evidence when it matters most.
Why Timing Is Everything: The Evidence Lifecycle
Most digital evidence has a shelf life, and it is often shorter than employers expect.
Evidence That Disappears Fastest
Security camera footage: Many systems overwrite on a rolling 7- to 30-day cycle. Miss that window, and footage will be gone.
Messaging platforms: On Slack’s free plan, workspaces are limited to the most recent 90 days of message and file history, and data more than one year old may be deleted. Paid plans may also auto-delete depending on administrative settings. Teams and Google Chat similarly allow configurable retention settings that many organizations never revisit after initial setup.
Deleted text messages: In some circumstances, recently deleted messages may be recoverable from a device for a limited period of time, depending on the device, settings, and whether backups exist. Employers should assume deleted texts are time-sensitive and act quickly.
Web browsing history: Browser caches on company devices typically overwrite within days to weeks.
Evidence That Persists Longer (But Is Not Permanent)
Email: Often retained for months or years, but individual mailboxes may be purged or access disabled when an employee separates, especially under standard offboarding protocols.
Badge and access logs: Building access systems often retain data for 60 to 180 days.
Cloud collaboration platforms: Google Workspace and Microsoft 365 can maintain audit logs (who accessed, edited, downloaded, or shared documents) for set periods that vary by configuration and license, but not indefinitely.
CALIFORNIA NOTE: California employers face a unique tension. The CCPA/CPRA framework emphasizes data minimization and storage limitation; employers should not retain personal information longer than reasonably necessary for disclosed purposes. At the same time, FEHA requires employers to take reasonable steps to prevent harassment, discrimination, and retaliation and to respond appropriately to complaints (Gov. Code § 12940(k)). The practical takeaway: retention policies must balance both obligations. Retaining too much data increases privacy risk; retaining too little increases investigation risk.
Before the Complaint: Building an Investigation-Ready Organization
The most important digital evidence decisions happen long before anyone files a complaint.
Audit Your Retention Settings
We cannot count the number of investigations where relevant evidence had already been purged by the organization’s own default settings—settings no one reviewed since the platform was first configured. If you are an HR leader or business owner, walk through these questions with your IT team for every digital platform you use:
- What is the current retention period for messages, files, and logs?
- Who can place a litigation or investigation hold on specific data?
- Are deleted items truly deleted, or do they go to a recoverable archive?
- How long does it take to retrieve data once a preservation request is made?
- Is there an audit trail showing who accessed or modified records?
PRACTICAL TIP: Create a one-page “Digital Evidence Quick Reference” for your HR team listing each platform, its retention window, the IT point of contact for data retrieval, and estimated turnaround time. This document can save valuable time during an active investigation.
Ensure Your Policies Support Your Investigations
One of the most important policies for digital evidence is your electronic communications and monitoring policy. It serves two purposes: it establishes the employer’s right to access data on company systems, and it sets employee expectations about privacy on those systems.
A well-drafted policy should state clearly that the employer reserves the right to access, monitor, and review all data on company-owned systems and devices, including email, messages, browsing history, and files, and that employees should not expect privacy when using those systems, to the extent permitted by law.
CALIFORNIA NOTE: California provides meaningful privacy protections, including a constitutional right to privacy (Cal. Const., Art I, § 1). Courts have held that clear monitoring policies can substantially reduce an employee’s expectation of privacy on company systems, while the absence of a clear policy can increase risk (e.g., Holmes v. Petrovich Development Co. (2011) 191 Cal.App.4th 1047.
The Synced Personal Device Problem
An employee plugs a personal phone into a company computer to charge it, clicks through a prompt without reading it, and inadvertently syncs personal data, photos, text messages, and health information to the company’s system. The employer now has access to deeply personal information it never intended to collect. That data may contain relevant evidence, but accessing it without careful consideration of privacy implications can create risk and complicate the investigation.
Our recommendation: address this in your electronic communications policy by prohibiting personal device syncing to company equipment, and direct IT to disable auto-sync features where possible. Prevention is far simpler than the complications that follow.
About California Labor Solutions
California Labor Solutions (CLS) provides independent, impartial workplace investigations for California employers. Our investigators hold advanced credentials* in human resources, and our work meets the Association of Workplace Investigators (AWI) standards. When a workplace complaint demands a thorough, defensible investigation, CLS delivers.
*CA Private Investigator License No. 26311.
Need help with a workplace investigation or want to evaluate your organization’s investigation readiness? Contact California Labor Solutions at https://www.californialaborsolutions.com/contact/
Disclaimer
Please note that regulatory updates and advisories from governing agencies may contain ambiguities or be subject to frequent revisions. This material does not constitute legal advice. The information and opinions shared are based on our reasonable interpretation of the agency’s guidance at the time of publication and may change as new developments arise. Outcomes may vary depending on your specific circumstances.