Irby is accused of arguing with a 32-year-old man, then pulling a knife and cutting the other man’s neck. The incident occurred around 9 p.m. Saturday in the Pleasant Grove section of southeast Dallas.
Police spokesman Lt. Max Geron said the victim was taken to Baylor University Medical Center at Dallas with critical injuries.
Irby also faces a charge of marijuana possession. Dallas County records indicate he faces previous charges of driving with a suspended license and failure to carry a license.
Information from: The Dallas Morning News, http://www.dallasnews.com