The jury found that Deya Deyanov was guilty of murdering 60-year-old grandmother Jennifer Mills-Westley because he took his victim by surprise and she could not defend herself.
Even though he was suffering schizophrenia and his responsibility was diminished, in Spanish law he is guilty of murder.
Wearing an olive green hoodie, black tracksuit trousers and running shoes, Deyanov remained quiet and still as the verdict was read out.
Asked by magistrate Maria Jesus Garcia Sanchez if he had anything he wanted to say, he told his Bulgarian interpreter:
I am the the second reincarnation of Jesus Christ and I will bring the fire of the Holy Spirit to bear against this court.
More top news
A police officer who sparked a terror alert by making a hoax 999 call to his own force has had his "unduly lenient" jail term increased.
Autumn weather arrives for the early part of the weekend, brighter on Sunday.
The Prince and Princess are being treated to a petting zoo and a puppet show along with the children of local military families.