DETROIT, MI -- Mayor Mike Duggan wants Detroit's police officers to wear body cameras.

The possibility has been discussed in the past, and 30 officers wore Taser brand body cameras during a trial in April, but Duggan's announcement during his State of the City Speech Tuesday night at Detroit's 87-year-old Redford Theatre inches the prospect closer to reality.

"The other thing that we are going to be proposing is to be one of the leaders in the Unites States in putting body cameras on police offices so we can see the interaction," Duggan said, adding that officers who participated in the trial said suspects actually behaved more calmly knowing their actions were being recorded.

"I saw this," said Duggan. "I was the prosecutor when the dashboard cameras first went in, and there were a couple times that I prosecuted police officers because of the evidence on the camera, but there were a whole lot more times the police officer was cleared because the person in the back seat of the car had no idea that they were being recorded and their false actions could be disputed.

"We feel very confident about this, so in the next couple weeks Chief Craig and I will be sending the recommendation to the Detroit Police Commission and the Detroit City Council to consider deploying body cameras, first on a demonstration basis, and then throughout the department. We think it's going to build the trust between the police and the community."

The cameras used in the April trial cost between $300 and $500 per unit, Taser account manager Vincent Valentine said when the program was launched. With nearly 1,700 patrol officers, that would bring the total cost up to $850,000, not including data storage and other costs.

Cameras used in the April trial were self-contained, engaged by the officer and uploaded to a data storage devices as needed during the officer's shift.

Detroit Police Officers Association union President Mark Diaz said officers aren't against the cameras, so long as they're for recording interactions with the public, and not to record every occurrence of an officer's shift.

"The added pressure of having your boss watching you all the time is unnecessary," Diaz said Tuesday.

Duggan didn't say if the decision to move forward with cameras has anything to do with citizen-police unrest prompted by nationally criticized deaths like the police shooting of Mike Brown in Ferguson, Mo., but said the relationship with the public is "extremely important."

"There have been incidents that have happened in other cities in this country," he said, "and they're capable of happening anywhere if we're not vigilant."