An appeals court on Friday refused to reconsider music producer Phil Spector's appeal of his murder conviction, saying there was overwhelming evidence of his guilt.

The California 2nd District Court of Appeal panel acknowledged it did not consider an issue that defense lawyers now say was critical to his conviction.

The panel blamed the lawyers for failing to sufficiently brief the point and said they had no obligation to consider it.

They quoted case law saying, "Issues do not have a life of their own: if they are not raised ... we consider the issues waived."

Spector, a legendary rock music producer, was convicted two years ago of fatally shooting actress Lana Clarkson at his Alhambra mansion in 2003. He is serving 19 years to life in prison on a second-degree murder conviction.

His first trial ended in a hung jury; the second ended in a conviction.

Defense lawyer Dennis Riordan said he will be filing an appeal with the California Supreme Court on June 13. Riordan said in an interview the court ignored a central issue of the case.