Serj Tankian, the lead vocalist of the band System of a Down, has said that Chris Cornell’s death still “doesn’t make sense.”

Cornell, the voice behind grunge pioneer Soundgarden, died on May 18, 2017, hours after the band performed in Detroit. . The body of the band’s lead singer was found on a bathroom floor in the MGM Grand Detroit hotel, with the cause of death officially ruled as suicide by hanging.

The singer, who also fronted supergroup Audioslave, was known for his ominous lyrics, coupled with the bravado of his legendary four-octave voice.

During an interview for the YouTube channel, Mythical Kitchen, Tankian opened up about the people in his life who have died by suicide, including Cornell. The channel’s host, Josh Scherer, asked the singer if had managed to make sense of the senseless.

Regalrumination.com emailed a spokesperson for Tankian for comment on Tuesday.

“I think when you feel hopeless, the most dangerous thing for a human being is hopelessness, I think, you know? And when you feel hopeless, then you see those doors closing. You don’t see the light at the end of the tunnel,” he explained.

“That’s the most dangerous thing as far as what we’re talking about and, you know, experiencing it with Chris Cornell, who’s also a dear friend. And I had just seen him months before, and he had a lot of dreams, you know?”

Tankian said he had been talking to Cornel about his tour with Soundgarden and his solo acoustic material in the lead-up to this death. He had encouraged his friend to sing with an orchestra and had even offered to help with the string arrangements.

The lead vocalist said that he told Cornell that he’d “love to help” because he wanted to hear his voice with an orchestra.

“We talked about that, he had, a covers album in mind. Like, he had a lot of plans, which is why I can’t understand, right?” Tankian continued.

“When you have a lot of plans, you don’t just shut them down in one day. Right? Like, it doesn’t make sense. Still.”

by Cornell, guitarist Kim Thayil and bassist Hiro Yamamoto and was the third most prominent band to emerge from Seattle’s grunge scene, behind Nirvana and Pearl Jam. Its 1994 album, Superunknown, hit No. 1 on the Billboard charts, won a Grammy Award and is certified six times platinum.

Cornell’s breakthrough moment occurred in 1991, when he formed a one-off band with then-unknown members of Pearl Jam called Temple of the Dog. The band was created in tribute to Cornell’s late friend and Mother Love Bone lead singer Andrew Wood, who died from a heroin overdose.

Soundgarden disbanded in 1997—before reuniting in 2010—and by 2001 Cornell had formed Audioslave, recruiting Rage Against the Machine guitarist Tom Morello to ride shotgun. Audioslave had moderate success, but never approached the impact either of those two bands had in the 90s.

Cornell battled depression and drug problems at an early age. In 1994, he told Rolling Stone he was “a daily drug user at age 13” but had quit by the following year. He had also been a “pioneer,” as he once told The Guardian, in the use of the opiate OxyContin.