How Age Guesses Shape Court Decisions in Sweden

Swedish courts often rely on age estimates when deciding criminal cases. Out of 61 reviewed rulings, these guesses played a big role at three key cutoffs: 15, 18, and 21 years old. The judges looked at different kinds of proof—like medical tests, witness statements, and official documents—to figure out someone’s age. But not all evidence carried the same weight. For example, scientific tests had more influence than just hearing people talk about a person’s age or seeing old papers.The biggest impact came when a serious crime like assault was involved. If the prosecution had solid scientific proof that someone was at least 18, the court was 38 times more likely to accept that age compared to other types of evidence. That doesn’t mean other clues were useless, but they clearly mattered less. The study also noticed that mistakes can happen in two ways: either because the methods used to guess age aren’t perfect, or because people making decisions sometimes see what they expect to see. This raises questions about fairness. If one piece of evidence can change a case so dramatically, should courts be more careful about how they use age estimates? It also makes you wonder how often wrong guesses lead to unfair outcomes.