UK Anti-Doping (UKAD) has imposed its first lifetime ban to the father of a Welsh amateur boxer for a string of violations.
Philip Tinklin was convicted for conspiring to supply anabolic steroids after an investigation by Gwent Police.
He was handed a one-year conditional discharge during a hearing at Cardiff Crown Court in January.
Tinklin has now been banned for life from sport by UKAD after it charged him with three anti-doping rule violations:
• Possession of one or more prohibited substances
• Trafficking or attempting trafficking of prohibited substances
• Assisting, encouraging, aiding, abetting or covering up or any other type of complicity involving an anti-doping rule violation or any attempted anti-doping rule violation.
His daughter Sophie, an amateur boxer, has been banned for four years by UKAD, until February 18 2018.
She was found to be in possession of prohibited substances - anabolic agents, hormone and metabolic modulators - and guilty of trafficking or attempted trafficking.
Sophie is one of five children, all of who are involved in boxing.
The UKAD Panel found Tinklin's involvement in the sport was "significant... amounting to transporting his own and other children to Welsh Amateur Boxing Association events and competitions".
He therefore fell into the definition of "athlete support personnel" in the anti-doping rules, UKAD said.
"This is another landmark case for UK Anti-Doping - a first lifetime ban for a support person and a significant illustration of the value of our ongoing collaboration with the law enforcement community," said UKAD chief executive Andy Parkinson.
"In 2009, UKAD set out to be an intelligence-led anti-doping organisation.
"Today shows how far we have come in achieving that aim and underlines the direction the anti-doping community is moving in.
"I would like to thank Gwent Police for their crucial role in this case and again underline the vital work of law enforcement in the fight against doping."
Detective Constable Mick Lumsden, from Gwent Police, added: "Gwent Police investigates all reports of drug supply.
"Steroid supply has enormous financial gain whilst affecting the health of others and we are happy to share information with partners such as UKAD to ensure the practice is disrupted."