In his new memoir 'Darkness to Light', basketball star Lamar Odom confessed he once told his former wife Khloé Kardashian that he would "kill" her.  "I’ll f**king kill you! You don’t know what I'm capable of!", he recalled yelling at his former wife while high on hallucinogenic drugs, according to a Hollywood Life report.

During a May 28 appearance on 'Good Morning America', the 39-year-old basketball player said, "I'm pretty sure she had to be scared at that point in time… I’m thinking about it now, I couldn’t believe how I was treating that queen like that."

Odom then said he had never apologized to Khloe for his behavior. "Yeah. [I owe] her and her family an apology. Big time," he said.

In his memoir, Odom had recalled taking cocaine and ecstasy in his "man cave" while Khloé was at home, stated a Page Six report. When he began hallucinating, the now-34-year-old Khloé called his friends for help. However, after his friends left their house, Odom said he was so outraged he "forcefully" grabbed the 'Keeping Up With the Kardashians' star and shouted threats to her face. "What the f**k are you doing?", Odom asked as he screamed at Khloé. "You trying to embarrass me in front of my friends? I'll f**king kill you! You don’t know what I’m capable of!"

During his interview, Odom also opened up about cheating on Khloé with "multiple" women and doing drugs behind her back. "I was professional at hiding it, Khloé didn't know for a long time," he told GMA. "When you're married you don't want your wife to know you sniff coke and have sex with other women… She took care of me. Everything I ever wanted or needed."

One of the most shocking revelations from his upcoming book is that in 2004, he used a fake penis full of someone else's urine to pass a drug test in order to get on the US Olympic basketball team. "I unzipped my pants and carefully slid the fake penis through the zipper hole. To get the pee to come out of the tip, I had to squeeze the shaft repeatedly," Lamar wrote. "[The drug tester] stuck a thermometer in the cup to gauge the temperature… satisfied that the pee was mine, and said 'Welcome to Team USA'."

Odom now says he misses Khloé a lot, three years after the pair divorced. Speaking to Hollywood Life, a source close to the former NBA star said: "He thinks about her constantly and that breakup was such a hard thing for him," the source said. "Lamar is considering now more than ever reaching out to her, but of course, he's afraid he'll get rejected by her. He will always love her."

However, Khloé has officially moved on and is not interested in getting back together with Lamar, according to sources. Nonetheless, she's reportedly "happy" for him and supports the release of his new memoir.