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IMAGE: Conaway
Reuters file
Actor Jeff Conaway, seen here in 2003, died of multiple causes including a major infection.
updated 10/3/2011 10:36:14 AM ET 2011-10-03T14:36:14

Autopsy results show that Jeff Conaway, the star of "Taxi" and "Grease" who struggled with addiction before his death in May, died from multiple causes including a major internal infection.

In ruling the actor's death accidental in a report released on Friday, the Los Angeles County coroner specified a number of contributing factors, among them septic emboli, aortic valve endocarditis, coronary artery disease, pneumonia and encephalopathy.

The four-month investigation by Coroner Craig Harvey's office did not include a toxicology test because Conaway, 60, had been in the hospital for more than two weeks at the time of his death, and any test for illicit drugs would have come back clean.

Slideshow: Jeff Conaway's life and career (on this page)

Conaway, who had a history of addiction to prescription and nonprescription drugs as well as alcohol, was hospitalized May 10 after being found unconscious in his Los Angeles area home.

At the time, he was also suffering from pneumonia and sepsis and was recovering from back surgery. He remained in a coma until his May 27 death, a day after his family took him off life support.

The actor's problems with addiction were documented in 2008 when he appeared on the TV series "Celebrity Rehab."

Conaway found fame when he starred as the wise-cracking teen Kenickie in the 1978 film musical "Grease," alongside John Travolta and Olivia Newton-John. He also became a television regular as struggling actor and cabbie Bobby Wheeler on the hit comedy "Taxi."

During Conaway's final illness, his manager, Phil Brock, told Reuters that the actor had a rough childhood. "When he was 7 years-old, his grandmother let him taste the moonshine she made in her bathtub; when he was 10 and a child actor, his dad took all his money and ran away. Later, Jeff had the world in his hand and would find ways to destroy it," Brock said.

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Photos: Jeff Conaway

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  1. Fresh-faced youth

    Jeff Conaway, who died on May 27, 2011 is best known for two roles -- that of Bobby Wheeler on the hit sitcom "Taxi," and of Kenickie in "Grease." On "Taxi," Wheeler was a handsome struggling actor who drove a cab while trying to make it in his chosen field. (ABC) Back to slideshow navigation
  2. Hanging with the cabbies

    In addition to Conaway, at rear in leather jacket, "Taxi" brought fame to Danny DeVito, Marilu Henner, Andy Kaufman, Randall Carver , Tony Danza and Judd Hirsch. Conaway left the show after its third season, but made guest appearances in the fourth season. "Taxi" ran from 1978-1981. (ABC) Back to slideshow navigation
  3. We go together

    "Grease" moved from the stage to the screen in 1978 and was a huge hit. Olivia Newton-John and John Travolta led the cast as star-crossed lovers Sandy and Danny, but Conaway and Stockard Channing more than held their own as Danny's bad-boy pal Kenickie and tough girl Rizzo. Conaway for a time was married to Olivia Newton-John's sister, Rona. (Paramount Pictures) Back to slideshow navigation
  4. Space man

    In the 1990s, Conaway played Sgt. Zack Allan on "Babylon 5," and also appeared in the series' related TV movie, "A Call to Arms." (Warner Bros.) Back to slideshow navigation
  5. Happy couple

    Conaway and wife Keri, seen here in 1997, wed after his marriage to Rona Newton-John ended. (Albert Ortega / Getty Images) Back to slideshow navigation
  6. Musical interlude

    Conaway struggled with substance-abuse issues but sought treatment and was candid about his problems. In 1999, he would regularly host what he called a "booze and bible" study group at his home, where he is pictured in his recording studio. (David Claborn / Getty Images) Back to slideshow navigation
  7. Remembering those summer nights

    In 2002, Conaway joined fellow "Grease" stars Olivia Newton-John and John Travolta to celebrate Paramount Studios' 90th anniversary. "Grease" was one of six musicals re-released to mark the occasion. (Jon Kopaloff / Getty Images) Back to slideshow navigation
  8. Hitting the right notes

    The role of Kenickie would never leave him. Conaway performs at a 2004 "Grease"-themed fundraiser for Alzheimer's disease in Beverly Hills, Calif. (Frazer Harrison / Getty Images) Back to slideshow navigation
  9. Old 'Taxi' mates

    In 2006, Conaway reunited with former fellow "Taxi" stars Christopher Lloyd, Danny DeVito and Marilu Henner to mark the premiere of the second season of DeVito's FX show, "It's Always Sunny in Philadelphia." (Mark Mainz / Getty Images) Back to slideshow navigation
  10. Go, Greased Lightning

    "Grease" stars Lorenzo Lamas and Susan Buckner, director Randal Kleiser and stars Didi Conn, Conaway, Eddie Deezen and Annette Cardona attend the 2006 celebration of the DVD release of the "Grease Rockin' Rydell Edition." The DVD was sold wrapped in a black leather jacket. (David Livingston / Getty Images) Back to slideshow navigation
  11. Honored for 'Taxi'

    Former "Taxi" cast members Randall Carver, Judd Hirsch, Danny DeVito and Conaway accept the Medallion Award onstage during the 2007 TV Land Awards. The honor is presented to a TV series that has "stood the test of time and ranks among the most memorable and celebrated shows in TV history." (Kevin Winter / Getty Images) Back to slideshow navigation
  12. Stepping out for charity

    Conaway and girlfriend Vikki Lizzi attend The HSFF Celebration and HUFH charity event in 2009 in Hollywood, Calif. Their tumuluous relationship was viewed by many on "Celebrity Rehab," where Dr. Drew Pinsky scolded Lizzi for interfering with Conaway's rehab. The couple also made a CD together. (Koi Sojer / FilmMagic) Back to slideshow navigation
  13. Mountains to climb

    Substance-abuse problems followed Conaway for decades. He sought help, both publicly and privately, but was been unable to remain clean, perhaps due in part to constant back pain for which he has undergone numerous operations. (Tiffany Rose / Getty Images) Back to slideshow navigation
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