Former Blackwater security guards convicted Wednesday of killing unarmed Iraqi civilians will challenge the verdict, according to defense lawyers. The case, they said, isn’t over.

The 2007 shooting in Baghdad’s Nisour Square left 14 people dead and 20 wounded. The jury, which began deliberating in early September, found one of the guards, Nicholas Slatten, guilty of murder. Three other guards, Paul Slough, Evan Liberty and Dustin Heard, were found guilty on voluntary manslaughter and other related charges. Slough, Liberty and Heard were not charged with murder.