​Whodunit?
Friday evening, the mom asked her kids, “Who broke the vase?”

The dad enumerated the whereabouts of the siblings prior to the incident:

John was studying in his room when he heard the loud crash in the living room. Peter was playing games on his PS4 in the gaming room with volume on max. Matthew just entered the house after biking with his friends and found the vase already broken.

The mom described the situation :

John’s room is right beside Peter’s. The game is just above the living room and comes first before  the three bedrooms. Matthew doesn’t have a bike.

Whodunit?