In addition to the charge of murder, the man has been charged with rape and arson with intent to endanger life.
The man is expected to appear before Derry Magistrates’ Court on Thursday, August 29, for a first remand hearing.
As is normal procedure, the charges will be reviewed by the Public Prosecution Service.
The body of Ms Martorell was found in the early hours of last Saturday morning at a flat in Derry’s Harvey Street.
Detectives said Ms Martorell had been the victim of a “brutal and savage attack”.
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