Chris Cornell reportedly had fresh track marks on his arm when he was found dead in his hotel room from an apparent suicide.
Sources familiar with the investigation told TMZ on May 25 that the 52-year-old singer had "obvious" track marks, though whether or not Cornell, who had a history of substance abuse, had injected heroin or any other drug into his bloodstream won't be known for sure until the toxicology tests come through.
Cornell's house engineer and tour manager, Ted Keedick, said that in the hours before his death, the grunge star was acting "high" and "f***ed up," though he seemed to be in good spirits and not depressed.
Even during the soundcheck on the day of his death, Cornell "was having serious control problems," Keedick said.
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"Chris was out of character from note one of the show," he explained. "I've never heard or seen him that way before, at least if we did not cancel a show."
Keedick, who was in the middle of the Detroit audience mixing sounds, said he was so worried about Cornell during the show that he called up somebody who was backstage to ask what was wrong with the singer.
Cornell's wife, Vicky, confirmed that her late husband was in good spirits when they spoke before the concert, and they even cheerfully planned a vacation for Memorial Day.
But when she spoke with him after the show, she could tell that something was off. Chris was slurring his words and told her he "may have taken an extra Ativan or two," referring to the sometimes addictive anti-anxiety medication that can cause paranoia and suicidal thoughts.
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"The family believes if Chris took his life, he did not know what he was doing, and that drugs or other substances may have affected his actions," the family lawyer said in a statement.
In a letter from Vicky to her late husband, published on May 24 by Billboard, the widow said that she was "broken" but would protect Chris's legacy and take care of their two children.
"We had the time of our lives in the last decade and I'm sorry, my sweet love, that I did not see what happened to you that night," she wrote, according to Billboard. "I'm sorry you were alone, and I know that was not you, my sweet Christopher. Your children know that too, so you can rest in peace."