George Kerns, the spokesman, said the Narcotics Strike Force detective, whom he declined to name, kept his finger in the trigger well of the revolver during the struggle, preventing the weapon from firing. He said the revolver was pointed at several of the detectives in the room at times during the altercation.
Kerns said Guzman fell as a result of the struggle and apparently hit his head.
Jorge Gomez, 21, and Sylvia Surles, 36, who live in the house that was raided, also were arrested. Gomez, Surles and Guzman were charged with possession with intent to distribute cocaine, conspiracy and possession of narcotics within 1,000 feet of a school.
Guzman also was charged with unlawful possession of a weapon after detectives found a .38-caliber handgun in the house, and Gomez was charged with making a cocaine sale to an undercover detective Wednesday, Kerns said.
Gomez and Surles were being held without bail at Camden County Jail pending a preliminary hearing scheduled for today.
At the Kaighn Avenue house, Kerns said, detectives recovered one pound of cocaine, which they said had a value of $50,000, and $4,100 in cash.