California Case Summaries

Foster v. Herrenschmidt — Audio-Capable Ankle Monitor Claim Passes Initial Screening

Unreported / Non-Citable

Case
Martin Lee Foster v. Dylan, et al.
Court
U.S. District Court — Eastern District of California
Judge
Sean C. Riordan (U.S. District Court for the Eastern District of California, by Chief Judge Kimberly J. Mueller, 2024)
Date Decided
2026-10-28
Docket No.
2:25-cv-00456-WBS-SCR
Status
Unreported
Topics
Fourth Amendment, GPS ankle monitors, audio monitoring, section 1983, prisoner screening

Background

Martin Lee Foster, a county-jail detainee proceeding without counsel, filed a civil-rights complaint under 42 U.S.C. § 1983 concerning an ankle monitor imposed during probation. After earlier pleadings were dismissed with leave to amend, Foster filed a third amended complaint naming probation officer Dillon Herrenschmidt and Governor Gavin Newsom. Magistrate Judge Sean C. Riordan screened that pleading under 28 U.S.C. § 1915A, which requires courts to dismiss prisoner claims that are frivolous, fail to state a claim, or seek damages from an immune defendant.

Foster alleged that Herrenschmidt installed an unapproved GPS monitor with an intercom feature. According to the complaint, the feature interrupted a sexual encounter and several business meetings. Foster did not clearly identify a legal cause of action, so the court construed the allegations liberally as a Fourth Amendment claim challenging an unreasonable invasion of privacy. The court separately considered whether any allegations connected Governor Newsom personally to the asserted violations.

The Court’s Holding

For screening purposes only, the court found the allegations minimally sufficient against Herrenschmidt. The Fourth Amendment protects reasonable expectations of privacy, although probationers have diminished privacy interests and monitoring may serve legitimate governmental purposes. At this preliminary stage, the court lacked briefing about why this particular device and its intercom function were used, what governmental interests they served, and what immunities Herrenschmidt might assert. That undeveloped record prevented dismissal of the alleged audio-related intrusion at screening.

The court ordered service of the third amended complaint on Herrenschmidt and directed Foster to return a summons, a USM-285 form, and copies of the complaint within 30 days. It expressly reminded Foster that the United States Marshal—not Foster—would perform service after the paperwork was submitted. Allowing service does not decide that the monitoring was unconstitutional; it permits the defendant to respond and raise defenses.

By contrast, the court found no viable claim against Governor Newsom. Foster alleged no facts showing the governor participated in or knew about the monitoring decision. Section 1983 does not impose liability merely because an official supervises others. To the extent Foster sought damages from Newsom in his official capacity, the Eleventh Amendment also barred that relief. Because previous screening orders had identified the same defects and amendment had not cured them, the magistrate judge recommended dismissing Newsom without further leave to amend. Objections to that recommendation were due within 21 days; the district judge had not yet adopted it.

Key Takeaways

  • An allegation that an ankle monitor’s intercom intruded into private conversations can state a Fourth Amendment claim at the initial screening stage.
  • The ruling is limited: the court had no defense briefing about legitimate monitoring interests or immunity and did not decide the merits.
  • Supervisory status alone does not create section 1983 liability; a complaint must connect the official to the alleged violation.
  • The order authorized service on Herrenschmidt, while dismissal of Newsom remained only a recommendation subject to objections and district-judge review.

Why It Matters

Electronic supervision increasingly combines location tracking with communication or audio functions. This order shows that courts may distinguish ordinary GPS monitoring from alleged intrusions into private conversations. Device capabilities, activation practices, supervision terms, and the government’s justification can therefore matter when evaluating reasonableness.

Practitioners should also track the order’s mixed procedural posture. The claim against Herrenschmidt merely survived screening, while the recommended dismissal of Newsom was not yet final. Describing either portion as a merits judgment would overstate what the court decided.

Read the full opinion (PDF) · Court docket

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