EL PASO, Texas -

The detective accused of coercing a confession out of convicted killer Daniel Villegas has taken the stand.

Former El Paso police detective Al Marquez, who has not been charged with any crime in connection with this case, testified Thursday he did not remember many details of the Villegas' case.

Villegas was convicted in the shooting deaths of Armando Lazo and Robert England 16 years ago. Two years before his conviction, at the age of 16, he confessed to the crimes to Marquez, without an attorney or his parents present.

Defense attorney Joe Spencer, showed a statement that Marquez, the lead detective in the case, took from Rudy and Javier Flores, the two men Villegas' advocates say may have killed the two victims.

In the statement given to police the morning after the murders, Rudy Flores said he was on the same street where the deadly shootings took place between 12:15 and 12:20 A.M. The 911 call reporting the killings came in at 12:18 A.M.

"I don't remember about the 911 call, I didn't even know there was a 911 call," Al Marquez testified.

Prior to the shooting in the Spring of 1993, police had conducted an investigation into threats by Rudy Flores. According to Spencer, Flores had threatened to shoot Armando Lazo, one of the victims Daniel Villegas was convicted of killing. Marquez, on the stand, acknowledged that prior investigation.

"Did your investigation show that he (Rudy) would terrorize people in his neighborhood?" asked Spencer.

"No sir, he was a prominent member of a gang," Marquez answered.

"And what do prominent gang bangers do in their neighborhoods?" asked Spencer.

"I don't know, sir," said Marquez.

"In all of your experience as a detective, you're clueless about that?" Spencer asked.

"I don't know, sir," said Marquez.

"You don't know if you're clueless?" Spencer asked.

"I don't know what they do, sir," responded Marquez.

Spencer, in an interview later, said the clueless question was 'unprofessional' but added he was only frustrated because Villegas has already unfairly spent half of his life in prison.

The defense attorney's questioning of Marquez lasted more than seven intense hours. Spencer's line of questioning, at some points, caused audible reactions from the public at the hearing, such as laughter and gasps.

"Rudy told Armando he was going to get shot. Coincidence?" Spencer asked Marquez.

"I don't know sir... we investigated (that claim) sir," responded Marquez.

"What did you do in your investigation? You don't remember?" Spencer asked, seemingly agitated.

"I don't remember," said Marquez, causing several people in the courtroom to laugh. Judge Sam Medrano ordered the public to refrain from any sort of reactions to testimony.

Spencer, in court Thursday, showed that at the time Lazo and Robert England were murdered, Flores lived a couple of blocks away from the crime scene. Spencer also showed a statement given to police from Rudy's brother, Javier, who said his brother, Rudy, was not home when he arrived at their house at 12:30 A.M. the night of the murders.

Rudy, in a statement to police said he had gotten home at 12:30 A.M.

"Did you notice that there were inconsistencies?" asked Spencer.

"No, sir I didn't notice," responded Marquez, at one point, during cross examination.