Psychiatrist was asking and investigating about the death of Seymour so was asking questions related to that.
Explanation:
One potential, if far less fulfilling, explanation behind Seymour's death is pedophilia. He's pulled in to Sybil and even ventures to such an extreme as to kiss her foot. He's at that point loaded up with disgrace at his activity thus executes himself, saving Sybil's virtue all the while.
So psychiatrist is trying to know the reason of the death of Seymour and investigating in that matter.
