20 June 2020, the President Michael D. Higgins led a memorial service on the grounds of Áras an Uachtaráin. On 21 June 2020, a state funeral was held in St James's Church in his hometown of Charlestown, County Mayo. Due to the COVID-19 pandemic in the Republic of Ireland, social distancing protocols meant the numbers in the church were limited to Horkan's immediate family along with Garda Commissioner Drew Harris and the Minister for Justice and Equality Charles Flanagan. Dáil Éireann and garda stations around Ireland marked a minute's silence to remember Horkan. The Taoiseach Leo Varadkar marked the minute silence at Garda Headquarters in the Phoenix Park. At Áras an Uachtaráin, the president attended a ringing the Peace Bell and raised the Irish flag at half-mast as a mark of respect to Horkan. On 5 September, Minister for Justice Helen McEntee honoured and reflected on the loss of Horkan as she marked National Services Day 2020. Alleged perpetrator Stephen Silver, a 43-year-old man living in Foxford, County Mayo, but originally from County Roscommon, was reportedly arrested at the scene by Garda Helen Gillen and was brought to Castlerea Garda Station. He appeared at Harristown District Court and was charged with the murder of Horkan on 19 June 2020. Silver was first remanded in custody to Castlerea Prison on 19 June and was then transferred to the Midlands Prison. Court Silver was repeatedly deemed unfit to attend court at Harristown District Court in Roscommon via video link due to mental health issues. In February 2021, the Castlerea District Court deemed Silver to be fit for trial after having subsequently been deemed unfit for trial on seven occasions. On 23 March 2021, it was announced that Silver would go on trial at the Central Criminal Court on 15 June 2022. Timeline 26 June 2020 – Silver was due to appear in court via video link on 26 June 2020 but was deemed unfit to appear for the first time. He was due to appear in court again via video link on 10 July 2020. 10 July 2020 It was revealed by Silver's solicitor Gearoid Geraghty that he was medically unwell and was unable to attend court for another two weeks. Silver was being detained at the Central Mental Hospital in Dublin, where he was receiving ongoing psychiatric treatment. He was due to appear in court again on 24 July. 24 July