The pair ordered to go to trial in the 2016 fatal stabbing of Luis Alberto Castaneira pleaded not guilty and denied all special allegations during their re-arraignment Thursday morning  at the Santa Maria Superior Court. 

Castaneira was killed during a confrontation Sept. 10, 2016, that occurred outside a home believed to be associated with Northwest Santa Maria gang members in the 900 block of West McElhaney Avenue.

Defendants Pedro Santos Mora and Abdu Rai Delgado will return to court May 17 for a readiness and settlement conference, with trial set to begin Aug. 13 in Judge John McGregor's courtroom. Trial confirmation is scheduled for Aug. 2. 

Mora is alleged to have wielded the murder weapon during the incident. 

A third defendant, Daniel Montelongo, was the first to be charged in the case in fall 2016. He has since pleaded to being an accessory after the fact. 

A fourth defendant, Fernando Garibay, pleaded to assault causing great bodily injury. 

Gina Kim covers crime and courts for Santa Maria Times. Follow her on Twitter @gina_k210