Jeff Conaway

The family of Jeff Conaway have decided to turn off his life support machine, but the decision has been blocked by the Grease and Taxi star's ex-girlfriend, according to reports.
Vicki Lizzi claims to be a guarantor of a living trust from 2007, which would grant her power of attorney over the 60-year-old star. If true this means that she has the legal right to decide on healthcare matters when he is unable to issue instructions himself, usurping the rights his family would otherwise assume.
Conaway's ventilator remains on while the hospital investigates the matter.
Conaway has been in a deep coma since taking an overdose of painkiller earlier this month. His family have maintained a bedside vigil after the former 'Taxi' actor was admitted to a Los Angeles hospital on May 11, but doctors have told them there are no longer any signs of brain functions.
“Doctors advised the family that Jeff has had no brain function since he was brought into the hospital,” a source tell website Radar Online. “The feeding tube has already been removed.”
Conaway is best known for the role of Kenickie in 'Grease' and a stint on TV series 'Taxi'. In recent years however he was seen on 'Celebrity Rehab', the US TV show that focussed on his addiction to drink and drugs. His manager, Kathryn Boole, told MailOnline that his struggles with substance abuse date back to the 70's, following injuries sustained on the stage while performing in Grease.
In 1980 Conaway married Grease star Olivia Newton John's sister, Rona, but the couple divorced five years later.