A man accused of murder sent letters to his home while in prison threatening to kill again, a court has heard.
Allan Menzies: Denies murdering Thomas McKendrick
Allan Menzies, 22, allegedly wrote that humans were animals and vowed to kill for a vampire that appeared in a film.
He denies murdering Thomas McKendrick at Mr Menzies' home in Fauldhouse, West Lothian, on 11 December last year.
The trial is taking place at the High Court in Edinburgh.
Mr Menzies is charged with repeatedly striking Mr McKendrick, 21, on the head with a baseball bat or hammer and stabbing him in the head, face and body.
He offered a guilty plea to a charge of culpable homicide on the grounds of diminished responsibility, but this was rejected by the Crown.
Mr Menzies' father Thomas, aged 49, told the court his son sent letters home while he was in Saughton prison and that he tried to take an overdose.
The accused had watched a vampire film, Queen of the Damned, which featured a female character named Akasha.
A card for visiting him in prison had been sent designating Akasha as his mother and Lestat as his father, the court heard.
Defence counsel Donald MacLeod asked Mr Menzies whether the letters sent by his son contained words written in blood.
"Yes," Mr Menzies replied.
The court heard that the accused wrote: "Dear Akasha, everything is going as planned. I will kill for you again soon.
The High Court in Edinburgh
"These humans are nothing but animals, fodder for us."
The word "vamp" appeared at the end in capital letters and appeared to be scratched in blood.
Mr Menzies said: "In my heart I wanted to believe him. In my mind I just didn't know what to think after Allan had taken an overdose."
He said his son had not told him why Mr McKendrick was killed or who killed him.
The trial continues.