POLICE are investigating two anonymous letters containing death threats that were sent to Maria Esther in the month leading up to her murder.
The family of the 13-year-old said they had just considered the letters to be a childish prank and paid no attention to them at the time.
But police are now looking to see if they were a serious threat.
Officers have also confirmed they have found a 70 per cent match between DNA found under the fingernails of the dead teenager and one of the people questioned.
Further analysis needs to be carried out before they can arrest the suspect but officers have confirmed they will be keeping a close eye on them.
In addition, the Olive Press can reveal the murder may be connected to the theft of five computers that were stolen two months ago from the town hall.
Police now believe they were kept in the same pool house that Maria’s body was found last week.