This article examines how a virtual case that prepares students for practical scenario training affects police students' performance in a practical scenario training. This study included 69 Swedish police students at the Basic Training Programme for Police Officers -- 35 assigned to a virtual police case (VCASE) and 34 assigned to a conventional teacher-led (CON) lesson. A questionnaire captured how students experience training conditions and a blind assessment by police officers evaluated the students' performance in the practical scenario training. The results show that both the VCASE and CON participants thought that the training they received before the practical training was meaningful and motivating. However, to a significantly higher degree than the CON students, the VCASE students thought that their preparation helped them during the practical training. The expert assessment of one practical scenario (stopping a suspected stolen car) showed that the VCASE participants performed better than the CON participants in three out of five criteria. In conclusion, the VCASE and the CON training had different effects on the students' performance in the practical scenario: compared to the CON training, the VCASE training seemed to more effectively help the police students solve the situations presented in the practical scenario training.