The suspect in the June assassination of Minnesota's house speaker and her husband, and the attempted murder of a state senator and his wife, pleaded not guilty to numerous charges in federal court on Thursday,

The man charged with killing a top Minnesota House Democrat and her husband and wounding another state senator and his wife pleaded not guilty at an arraignment hearing in a federal court on Thursday.

It's still unclear whether accused assassin's attorney plans to pursue a mental health defense now that his not guilty plea has been made.