Informed of the Supreme Court's decision yesterday refusing to hear the appeal, Peter Greenspun, one of the lawyers, said, "I'm very disappointed."
Prosecutors are not pursuing a death penalty in Montgomery County, so the maximum sentence he could receive if convicted is six life terms in prison without parole.
The cost of the trial that some people say is a waste of public dollars has not been calculated, but tops $500,000. So far, the county corrections department has spent $270,000 on Muhammad, 45, and Malvo, 21. Security for Muhammad cost the county sheriff's office $218,000 before jury selection began May 1.
Malvo, serving life without parole for Virginia shootings, is scheduled to be tried here in October but may testify against Muhammad.
• With testimony on the Oct. 22, 2002, slaying of bus driver Conrad Johnson, Montgomery County prosecutors wrapped up their presentations of the 13 sniper shootings during three weeks in October 2002 that claimed 10 lives.
• A police officer told of finding evidence near the site of the Johnson slaying, including a left-handed brown glove near a note in a tree that appeared to be from the snipers. Other police information indicated the glove was black, and Muhammad, acting as his own lawyer, seized on the discrepancy in cross-examination.
• Four witnesses, including a Virginia clergyman, told of telephone calls that officials believe were efforts by the snipers to open a line of communication with the government, and seeking $10 million to end the shootings. Today: Prosecutors move toward tying Muhammad to shootings elsewhere and his Oct. 24, 2002, arrest.
Sun reporter Julie Scharper contributed to this article.