I believed him/her
At first, I didn't believe him.
I believed him.
Jamás le creí ni una sola palabra.
I never believed a single word he said.
No le creí e hice unas llamadas.
I didn't believe him and made some calls.
— Mulholland Drive: Sueños, misterios y secretos (2001)
And I believed him, naturally.
— Indagine su un cittadino al di sopra di ogni sospetto (1970)