The sabotage

You've been seeing them all over the city for weeks: posters for the Lasertag Tournament. Today, it's set to begin, and the teams are slowly assembling in the arena while the staff on site are rushing around. A virus has been introduced into the system, and the first vests have already failed, even though the tournament is about to start! The police have a suspect who was recently excluded from the tournament for breaking the rules. They can't prove anything, but he was seen unusually often in the area. So far, no one has managed to access the virus and stop it. And suddenly, the suspect's sister approaches Mission Exit with a request. Can you help us fulfill her request and maybe even save the tournament?