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Conrad Murray lawyers want evidence retested

Conrad Murray is seen at sentencing in a Los Angeles courtroom on Tuesday, Nov. 29, 2011.

July 30, 2012 12:00:00 AM PDT
Lawyers for Conrad Murray are filing an appeal in hopes of getting his manslaughter conviction overturned.

Murray is serving a four-year prison sentence for his role in the 2009 death of Michael Jackson.

The appeal centers on a bottle of the anesthetic propofol. Murray's lawyers want a test of residue found in the bottle.

Jackson died of a propofol overdose while in Murray's care. The lawyers argue that if it comes up as 100 percent propofol, it would support their theory that Jackson gave himself a fatal injection of the drug.