Dominique ‘Mimi’ Costa

Corsican organized-crime figure described by authorities as a historic mafia-clan boss and founding-circle member of the Brise de Mer; convicted repeatedly for extortion, weapons and criminal-association offences.

Editorial standard

Convictions, acquittals, allegations, intelligence assessments and contextual links are separated. Sentence data is stated only where supported by the cited source set.

Background

French authorities describe Costa as a historic Corsican organized-crime boss and a figure from the founding circle of Brise de Mer.

Network

He accumulated convictions for extortion, weapons offences, financial crime and criminal association.

Major event

In 2025 he was acquitted of two specific attempted/actual murder counts but sentenced to ten years for criminal association aimed at preparing a crime.

Legal status

In June 2026 he received another one-year sentence and a €100,000 fine for aggravated fraud involving European agricultural subsidies while imprisoned.

Graph role

His profile links Brise de Mer, the Costa clan, central Corsica, white-collar laundering/fraud and the modern clan-vendetta layer.

Network links

– Brise de Mer — police-described founding-circle figure – Costa clan — leading figure – Costa–Mattei vendetta — central clan figure – Corsica — criminal base

Direct people links

– Richard Casanova — same historic Corsican organized-crime milieu

Sources

– Le Monde. Un chef de clan mafieux corse condamné après avoir demandé, de sa cellule, des aides européennes pour ses vaches (2026-06-19). https://www.lemonde.fr/societe/article/2026/06/19/un-chef-de-clan-mafieux-corse-condamne-apres-avoir-demande-depuis-sa-cellule-des-aides-europeennes-pour-ses-vaches_6704921_3224.html

Connected records

Documented network

Brise de Mer (organization) is recorded in the canonical graph as police described founding circle figure, documented status, 90% confidence. This is the stored relationship and should not be expanded beyond what the source record supports.

Costa clan (organization) is recorded in the canonical graph as leading figure, documented status, 90% confidence. This is the stored relationship and should not be expanded beyond what the source record supports.

Costa–Mattei vendetta (event) is recorded in the canonical graph as central clan figure, documented status, 90% confidence. This is the stored relationship and should not be expanded beyond what the source record supports.

Corsica (location) is recorded in the canonical graph as criminal base, documented status, 90% confidence. This is the stored relationship and should not be expanded beyond what the source record supports.

Richard Casanova (person): same historic Corsican organized-crime milieu

Timeline and case connections

Structured events are kept separate from general biography so later audits can update a date, conviction, organizational change, killing or court outcome without rewriting unrelated material.

Date not specified in current profile sources — Costa–Mattei vendetta. central clan figure

Status and record

The structured birth record lists circa 1955. The structured life-status field is alive. This administrative field should change only when a reliable current source supports an update.

Source record

The current Master package attaches the following evidence sources to this profile: – Un chef de clan mafieux corse condamné après avoir demandé, de sa cellule, des aides européennes pour ses vaches — Le Monde, Tier 2.

Each source supports only the claims tied to it. Structured source references remain attached so later audits can trace timeline and relationship records back to evidence.

Evidence and editorial boundaries

For living subjects especially, legal claims and current status require dated sourcing. Future expansion should therefore come from stronger records or newly processed canonical entities rather than unsourced crime lore.

How this profile fits the archive

The current source package includes Un chef de clan mafieux corse condamné après avoir demandé, de sa cellule, des aides européennes pour ses vaches. These records define the safe editorial boundary for the page. A later pass should prioritize new primary documents, court outcomes, dated organizational changes, prison history or newly processed books and screen works rather than adding generic background.

Research state

This depth pass expands the page from structured evidence already present in the Master. The profile should return to audit when a new source materially changes chronology, legal status, organizational role or media connections. Add the structured fact first, then update prose so narrative and knowledge graph remain synchronized.

Media remains a separate gate. A portrait should be attached only after source page, provenance and reuse status are checked. Until then, a profile can be text-complete while still carrying an explicit media-review requirement.