The victim was found with a band around his neck, Mr. Freeman said. The police would not confirm that the victim died of a suicide, though the preliminary determination was an “apparent suicide,” Mr. Freeman said. He added that more details would be released in a statement later Thursday.
Mr. Cornell was born in 1964 in Seattle and helped form Soundgarden 20 years later. Sub Pop, then a fledgling record label, released the group’s first single, “Hunted Down,” in 1987, as well as two subsequent EPs. The group’s debut album, “Ultramega OK,” came a year later.
“Badmotorfinger,” released in 1991, benefited from the swell of attention that was beginning to surround the Seattle scene, where Soundgarden, along with Nirvana and Pearl Jam, were playing a high-octane, high-angst brand of rock ’n’ roll. Soundgarden’s musical journeys tended toward the knotty and dark, plunging into off-kilter meters and punctuated by Mr. Cornell’s voice, which could quickly shift from a soulful howl to a gritty growl.
Three of Soundgarden’s studio albums have been certified platinum, including “Superunknown,” from 1994, which featured “Black Hole Sun,” “Fell on Black Days,” “Spoonman” and “My Wave.”
The group — which includes the guitarist Kim Thayil, the bassist Ben Shepherd and the drummer Matt Cameron — disbanded in 1997, but it reunited in 2010 and has performed regularly since then. In a review of a 2011 concert at the Prudential Center in Newark, The New York Times’s chief pop critic, Jon Pareles, called Soundgarden “one reunited band that can pick up right where it left off.” In 2012, it released “King Animal,” its first album in 16 years, which Mr. Pareles said “sounds like four musicians live in a room, making music that clenches and unclenches like a fist.”
The group played…