Mattheis is the son of one of our KIRO 7 employees. Our thoughts are with his family as they grieve this difficult loss.

The incident occurred at about 10:30 p.m. according to witnesses, though no details of how or why he fell have emerged.

A 15-year-old boy died following an incident in which he reportedly fell 50 feet off a structure at Gas Works Park in Seattle ...

Mattheis Johnson, 15, was killed in an accident following an outdoor pop-up concert at the Seattle park. SEATTLE — A Ballard ...

At least three people have died since 2012 after falling from one of the structures at Gas Works Park, the site of a former ...

The NFL's Ian Rapoport reports that Michigan defensive back Will Johnson visited with the Seattle Seahawks this past Wednesday. Seattle holds the No. 18 overall pick in this week's draft. Johnson ...

Sports Gregg Popovich's replacement as Spurs head coach hails from Seattle Johnson was a star at Seattle's O'Dea High School, and his father won an NBA championship with the Supersonics.

While attending a pop-up concert, a 15-year-old student sadly passed away after falling 50 feet at the Gas Works Park.

A 15-year-old Ballard High School student, Mattheis Johnson, died after falling at Seattle's Gas Works Park during a pop-up ...

A local community is mourning following the death of a 15-year-old boy, who passed away after falling 50 feet from a ...

The teen, identified as 15-year-old Mattheis Johnson, died in a tragic accident at Gas Works Park on Thursday.