[4] Campbell attended the Nicolson Institute, a school on Lewis, before studying at the University of Glasgow, where he graduated with First Class Honours in Arts in 1985.
He then pursued theological studies at the Free Church College and the University of London, again graduating with First Class Honours as a Bachelor of Divinity.
[5][4][9] He was also an adjunct professor of Church History at Westminster Theological Seminary, helping to deliver their London-based courses.
[10] Campbell committed suicide on 28 January 2017 at the age of 53, having hung himself in hospital after being admitted earlier for treatment for a suspected overdose.
[5] An early report stated that Campbell's wife, Anne, had discovered emails on his computer and accused him of having several extra-marital affairs with members of his congregation.