Third-degree assault is considered a Class A misdemeanor. It is defined as negligently causing injury using a deadly weapon or dangerous instrument.You will face a change of assault in the first degree if with intent to cause serious physical injury you seriously injure another person with a deadly weapon. Facing Assault With a Deadly Weapon Charges in New York? Call Lebedin Kofman LLP now at to discuss your case and legal options. You will face a change of Assault in the first degree if with intent to cause serious physical injury you seriously injure another person with a deadly weapon. Assault with a deadly weapon, often referred to as aggravated assault, is a grave offense in New York. Assault with a deadly weapon can lead to serious punishment. It is in your best interest to contact Raleigh criminal defense attorney David Coolidge. It is your choice whether you would like to press charges or not, but if you decide to do so it is always worthwhile to contact your local police department.