The verdict is in, but former Sinn Féin councillor Jonathan Dowdall is still serving his sentence for facilitating the murder of David Byrne in the Regency shootings. In today's episode, we look at the rise and fall of the state's star witness, and ask if the country's most popular party, Sinn Féin can shake off his association? Host: Siobhán Maguire. Guest: Fionnán Sheahan.