Griffin’s behavior towards his father?

Griffin's behavior towards his father was detached and unfeeling. He had no regrets about stealing his father's money (stolen money), nor, did he grieve his death.

“Money,” said the Invisible Man, and went again to stare out of the window.

He turned around abruptly. “I robbed the old man—robbed my father.

“The money was not his, and he shot himself.”

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“I did not feel a bit sorry for my father. He seemed to me to be the victim of his own foolish sentimentality. The current cant required my attendance at his funeral, but it was really not my affair.