SANTA ANA, Calif. (AP) — Prosecutors say they will no longer use secretly recorded statements to a jailhouse informant from a man charged with killing eight people in a 2011 rampage at a Southern California hair salon.

Deputy District Attorney Howard Gundy conceded a defense motion Tuesday alleging Scott Dekraai's statements were recorded in violation of his constitutional right to an attorney.

The Orange County Register reports that Gundy didn't explain the move and declined comment after court.

The statements, made during hundreds of hours of covertly recorded conversations between Dekraai and informant Fernando Perez, had been expected to be a key part of prosecutors' push for the death penalty.

Assistant public defender Scott Sanders alleged prosecutors used informants to improperly interrogate suspects in Dekraai's and many other cases. He's seeking to have the death penalty thrown out.

Trial is scheduled to start June 9.