Insanity is often the logic of an accurate mind overtaxed. The poor computer simply didn't know any better. The crime scene technician had fallen victim to the plague of Precision Without Accuracy, a malaise common to non-scientists, computer weenies, and used car salesmen. The terms accuracy and precision are often used synonymously, to mean exactness or freedom from error. Accuracy is the degree of exactness actually possessed by an approximation or measurement.
Precision is the degree of exactness with which a quantity is expressed.
It is possible to have precision without accuracy, as computers are wont to do. It is also possible to be accurate without being precise, which is actually the lesser of the two evils. While hundredths of an inch, microns, and nanometers are often of use in science and engineering, they are seldom of value on an exterior crime scene sketch. We are trying to make a fair and accurate representation of a crime scene, not build a new parking lot. Sometimes, juries are wrongly seduced by precisionistic witnesses.