An Atlantic City teen already being held on separate gun and drug charges was ordered detained Friday in connection with a December shooting that wounded a man and a woman. Quadri Cooper, 18, is accused of acting with two other people to ambush the victims as they sat in a parked car in the 400 block of North New Jersey Avenue just after 3 p.m. on Dec. 16, according to information presented in court. The complaint alleges that Cooper fired nine shots into the passenger side of the vehicle, striking both victims, including one in the head. In ordering him detained, Judge Dorothy Garrabrant said the victims had nowhere to go because they were trapped inside the vehicle. Authorities have not released information about the alleged co-conspirators. According to court filings referenced during the hearing, Cooper is connected to a gang. Assistant Prosecutor Chris D'Esposito argued that this showed motive, dangerousness, and access to a network that could help him flee, although he did not identify the gang or explain the alleged motive. Cooper was arrested six days after the shooting, when police say he and a 15-year-old boy hid a gun inside a store in the 1500 block of Atlantic Avenue after being seen in a drug transaction. He was already detained on those gun and drug charges when he appeared for the detention hearing in the shooting case. The hearing also included clarification that ballistics testing showed the gun recovered during that later arrest was not the one used in the Dec. 16 shooting. Prosecutors argued this showed Cooper had access to multiple firearms within a short period of time and was willing to use one. Defense attorney Yvonne Maher argued that the ballistic result meant there was no physical evidence linking Cooper to the shooting. She also said she had no evidence of any witness identifying her client and that he was linked to the crime through surveillance video she had not yet seen. Although Cooper had no other adult charges, he had turned 18 only about two months before the alleged crimes. Judge Garrabrant said it was appropriate to consider his juvenile history, which she described as extensive. She cited prior juvenile adjudications including burglary, receiving stolen property, attempted burglary, conspiracy to commit theft, conspiracy to commit burglary, prohibited weapons and devices, unlawful possession of a handgun, aggravated assault, simple assault, and a probation violation. The judge said prior juvenile sanctions had not rehabilitated him and instead reflected an escalation in violent criminal conduct. Cooper remains held at the Atlantic County Justice Facility on both cases.