The suspect, Denis Alexander Sanchez, 20, told detectives he called two members of MS-13 after the argument, picked them up and plotted Guardado-Huezo's killing, according to the search warrant.
Another suspect, a male 17-year-old from Chantilly, has also been charged with first-degree murder. The Washington Post generally does not name juveniles charged in crimes. Police have not released information about the third suspect and did not immediately respond to a request for information.
MS-13 has been going through a resurgence in the D.C. area in recent months. It has been tied to killings in Montgomery, Fairfax and Prince William counties and a surge in other crimes.
The slaying unfolded about 1:10 a.m. April 17 near Don Julio restaurant in the 9000 block of Centreville Road in Manassas, police said.
Police were called to the scene shortly after the shooting and found Guardado-Huezo with gunshot and stab wounds, according to the search warrant. Guardado-Huezo was taken to a hospital, where he was later pronounced dead.
Surveillance video from nearby businesses captured the arrival of the suspects in a Nissan Rogue, according to a search warrant. Two suspects are seen walking around a dumpster toward the area of the killing at about the time of the incident.
The driver of the vehicle entered Don Julio before the killing and was seen talking on a cellphone shortly after the slaying.
Detectives filed a search warrant seeking evidence from the home of one of the suspects charged. Among other items, the search warrant says, investigators recovered a knife, cellphones and an ID.