Alrico Nelson Martin, a resident of Kilburn in north-west London, appeared before Willesden Magistrates’ Court on Wednesday.
He was charged with six charges of conspiracy to intentionally cause bodily harm and possession of a shotgun with the purpose to endanger life.
Two men, aged 22 and 23, were detained on Tuesday on suspicion of plotting a murder, according to the Metropolitan Police.
On Saturday, January 14, shots were fired outside a funeral at St. Aloysius Church on Phoenix Road, Euston, killing four women and two girls, ages 11 and 7.
Requiem Mass was held as a memorial ceremony for Sara Sanchez, 20, and her mother Fresia Calderon, 50, who passed away in November.