Between Oct. 2 and Oct. 24, 2002, Muhammad, then 41, and his then-17-year-old accomplice, Lee Boyd Malvo, shot 13 strangers across several locations in Maryland and Virginia.
Robin Niceta, 42, pleaded guilty to two counts of attempting to influence a public servant, tampering with physical evidence, and a slew of other charges.
In April, a judge found Williams' 34-year-old boyfriend Brian Ward Coulter guilty of first-degree murder and sentenced him to life in prison without the possibility of parole following a five-day bench trial.
Amanda Hovanec, 37, was sentenced to 40 years in prison after she pleaded guilty to several charges, including distributing a controlled substance that resulted in the death of her husband, Timothy Hovanec.
A jury convicted Alvin Joseph Allen III, 23, of second-degree murder and illegal use of dangerous weapons for the death of 25-year-old Keandre Williams.
Danielle Dauphinais, 38, pleaded guilty to second-degree murder and two counts of witness tampering in connection with the death of her son, Elijah Lewis.
After a week-long trial, Mississippi teenager Carly Gregg has been found guilty of first degree murder, guilty of attempted murder and guilty of tampering with evidence.
Shawn Laval Smith, 34, was found guilty of one count of murder and a special-circumstance allegation of lying in wait in connection with the death of 24-year-old UCLA student, Brianna Kupfer, according to the Los Angeles County Prosecutor's Office.
