“Crime and Punishment” (Pt 2, Chap 1) by Dostoevsky: Raskolnikov probably switches to an alternate personality and back again

In his apartment after returning from the murders, Raskolnikov is frantically trying to hide all the evidence (blood on his clothes, loot, etc.).

Surprisingly, he's called to the police station. But it’s only about an unpaid debt. The police don’t connect him to the murders.

Nevertheless, while at the police station, he experiences a sudden, radical change in attitude: “Raskolnikov…suddenly felt decidedly indifferent to anyone’s possible opinion, and this change occurred somehow in a moment, an instant…And where had these feelings come from?…A dark sensation of tormenting, infinite solitude and estrangement suddenly rose to consciousness in his soul…Even if he had been sentenced to be burned at that moment, he would not have stirred, and would probably not have listened very attentively to the sentence. What was taking place in him was totally unfamiliar, new, sudden, never before experienced…Never until that minute had he experienced such a strange and terrible sensation…the most tormenting of any he had yet experienced in his life…A strange thought suddenly came to him…tell [the police] all about [the murders] yesterday, down to the last detail…” (1, pp. 103-104).

But the police say, “…we are not keeping you.”

“Raskolnikov walked out…In the street he recovered completely. ‘A search, a search, an immediate search!’ he repeated to himself, hurrying to get home. ‘The villains! They suspect me!’ His former fear again came over him entirely, from head to foot” (1, p. 106).

1. Fyodor Dostoevsky. Crime and Punishment: A Novel in Six Parts with Epilogue [1866]. Translated by Richard Pevear and Larissa Volokhonsky. New York, Vintage Classics/Random House, 1993.