Answer:no it will not be considered voluntary
Step-by-step explanation:
Reasons :
The overall circumstances that the boy was put under as a minor are unjust for example he was questioned for a longest period without a break and a person who has been put under that stressful situation for a long time may even confess under pressure and due to their mind being distorted as they become emotional exhausted.
The boy is a minor and he also constantly asked for his parents but was denied that but was questioned further in their absence.
They also used tactics on the boy in order to persuade him to confess and leading someone to confess under pressured information is never voluntary .