Legal Claims Available? Mattheis Johnson Seattle Concert Accident. We have over 25 years of experience representing victims of security failures across the United States, and we have recovered nearly $250 million dollars for our Clients. Read Our Legal Take below to find out what legal options are available to the family of Mattheis Johnson. Mattheis Johnson Dies After Fifty-Foot Fall at a Seattle, WA Park During Concert. (KING5.com) Seattle, WA – A High School student died after a falling accident at a park Thursday night, July 10, 2025. As reported by KIRO7.com, “[a] 15-year-old boy died from his injuries after falling from a structure at Gas Works Park in Seattle. It happened on July 10 during a pop-up concert.” King5.com is reporting, “Mattheis Johnson, 15, was killed in an accident following an outdoor pop-up concert at the Seattle park.” According to the report, “[a] spokesperson for the Seattle Fire Department said Johnson…