One of the injured woman lost her unborn child in the bombing and the cellmate said Mr Spies, who reportedly has a number of Neo-Nazi tattoos, had called this a case of “successful euthanasia.”
Other former prison mates also provided testimony against him, and taped phone calls appeared to show him boasting about the bombing. He was arrested in late 2017.
But during the trial a number of the witnesses withdrew their evidence, with the defence arguing that much of the testimony, coming as it did from prisoners attempting to plea-bargain, was not reliable.
The regional court released him from pre-trial detention in May due to "lack of sufficiently reliable testimony” and found him not guilty on Tuesday.
Mr Spies denied the charges against him.
