In “The Tell-Tale Heart”, WhIn “The Tell-Tale Heart”, Why does the killer confess?

The narrator starts to hear the heart beating while the police officers are in his home. It slowly drives him crazier and crazier, eventually confessing to the officers, thinking they know of his doings and mocking him.

the answer would be: it explains that at least one son must join the church

the expression ''as the tithe of his sons'' indicates how his father intended for at least one of his sons to serve the church. this phrase demonstrates that his father offered him as a last resort since none of his brothers chose to serve the church.

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