Robert F.

Legal experts say the antics of a Wisconsin man accused of killing six people by driving his SUV through a Christmas parade last year won't help him win an appeal.

Virginia has denied parole to convicted Washington, D.

Maryland’s highest court has heard arguments on whether Washington, D.

2009: John Allen Muhammad is executed via lethal injection at the Greensville Correctional Center near Jarratt, Virginia, for a 2003 capital murder conviction for one of the 10 victims killed during a three-week period of sniper shootings in the Washington, D.C., area. He had also been convicted of six counts of first-degree murder in Maryland in 2006 and sentenced to six consecutive life terms in prison. Muhammad and then 17-year-old Lee Boyd Malvo also critically injured three more people during their attacks in October 2002. Malvo ultimately was sentenced to a total of eight life sentences without the possibility of parole. Hide Caption

2002: A man is shot and killed in a grocery store parking lot in Wheaton, Maryland, becoming the first victim in a series of sniper attacks in the Washington, D.C., area, that would leave 10 dead and three critically injured over three weeks. It was later discovered that the rampage was perpetrated by John Allen Muhammad with the assistance of 17-year-old Lee Boyd Malvo. Muhammad would eventually be sentenced to death and executed by lethal injection on Nov. 10, 2009, while Malvo was sentenced to a total of eight life sentences without the possibility of parole. Hide Caption