Should the prayer for the deceased by led by his heir or by the regular imaam (of the mosque)?

Answer

Praise be to Allah.

The funeral prayer in the mosque should be led by the regular imaam. 

Source: Kitaab Majmoo’ Fatawa wa Maqalat Mutanawwi’ah li Samahat al-Shaykh ‘Abd al-‘Azeez ibn ‘Abd-Allah ibn Baz (may Allah have mercy on him), vol. 13, p. 137
