safety
Sex offender arrested for sexual assault in Tiburon hours after jail release
By Ryan Mense at KRON4 (KRON-TV)
· June 26, 2026
· 1 min read
(KRON) -- A registered sex offender is accused of sexually assaulting a woman on a Tiburon bike path Wednesday night, just hours after he was let out of jail for a separate sexual assault charge, according to police. The Tiburon Police Department said Robiel Sium, 29, of San Rafael, was on the bi...
Key takeaway The Tiburon Police Department said Robiel Sium, 29, of San Rafael, was on the bike path near [...
Why this matters in The San Francisco
The swift arrest of Robiel Sium in Tiburon raises concerns about the effectiveness of the justice system in protecting the community from repeat offenders. Given Sium's history as a registered sex offender and his recent release from jail on a separate sexual assault charge, his alleged actions on the Tiburon bike path suggest a troubling pattern of behavior. This incident may prompt local residents to question the measures in place to monitor and rehabilitate sex offenders, particularly those with a history of violent crime. The fact that Sium was able to commit another alleged assault just hours after his release from jail will likely lead to calls for increased scrutiny of the parole and probation systems, as well as the implementation of more robust support services for victims of sexual assault in San Francisco County.
About this story
Original reporting by KRON4 (KRON-TV) . The San Francisco surfaces reporting from trusted publishers and adds local editorial context so readers can quickly understand what a story means for their community. We attribute every source, link to the original report, and follow a documented editorial standards policy. To understand how stories are selected and reviewed, read our about page .
For the complete original report, visit KRON4 (KRON-TV) . Have a tip or correction? Contact our newsroom .
Category: safety ·
Published: June 26, 2026 ·
Source: KRON4 (KRON-TV) ·
Reading time: 1 min
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Frequently asked about this story
What is this story about? (KRON) -- A registered sex offender is accused of sexually assaulting a woman on a Tiburon bike path Wednesday night, just hours after he was let out of jail for a separate sexual assault charge, according to police. The Tiburon Police Department said Robiel Sium, 29, of San Rafael, was on the bi...
When was this published? This article was first published on June 26, 2026 by KRON4 (KRON-TV) and curated for The San Francisco readers.
Who reported this story? This story was reported by Ryan Mense at KRON4 (KRON-TV). To learn more about how The San Francisco selects and reviews stories, see our editorial standards .
Where can I find related coverage? See more safety coverage from The San Francisco, or browse our daily briefing and topic hubs .
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