Sebastian Telfair is in prison due to violations of the conditions of his supervised release in a health-care fraud case. He was sentenced to additional time for failing to comply with probation requirements, including meeting with his probation officer and pursuing appropriate employment, which led a federal judge to order him to serve six months in custody. He reported to a low- security federal facility in New Jersey to begin serving that sentence.

Key points:

• Original charges: defrauding the NBA's Health and Welfare Benefit Plan in a healthcare fraud case.
• Post-sentencing development: violation of supervised release terms, prompting additional imprisonment.
• Current status: began serving a six-month federal sentence at a New Jersey facility (Fort Dix FCI).

If you’d like, I can summarize the timeline of events or pull the latest updates from current news sources.