[8] By May 1994, when he was reportedly "bombed" by a seagull in Peterhead while taking voters to polling stations, Murrell was a "research assistant to party leader Alex Salmond".
[9] In February 1995, Murrell was working as a Parliamentary Assistant to Dr Allan Macartney MEP based in Aberdeen.
[13] By February 1999 he was working as a staff member in the new office of MEP Ian Hudghton in Aberdeen along with Dr Eilidh Whiteford.
[15] In March 1999 Murrell was quoted in the Aberdeen Press and Journal as "SNP Fisheries Spokesman" who supported controls on the number of grey seals.
[16] Murrell replaced Michael Russell as chief executive of the Scottish National Party (SNP) in 2001, under the leadership of John Swinney.
[25][26] Murrell has also faced questions from Labour and Conservatives over a £107,620 interest-free loan made to the SNP on 20 June 2021, that was not declared to the Electoral Commission for more than a year after the July 2021 deadline.
[32] This then led to the SNP's national executive committee giving Murrell an ultimatum as he was blamed for Foote having been misinformed.
"[34] On 5 April 2023, Murrell was arrested by police in connection with Operation Branchform, an investigation into Scottish National Party finances.
[38] As part of the investigation, a Niesmann + Bischoff motorhome was seized by police from Murrell's mother's home near Dunfermline.
[41] While running Alex Salmond's Banff and Buchan constituency office, Murrell helped to organise SNP youth weekends.