“We have no idea what the motive was,” he said. “It was a senseless shooting. That’s what makes it so cold-blooded.” Ariza and Salinas are being held in the sheriff’s Pico Rivera Station jail until their arraignment hearings set for Monday. Bail had not been set for either of them as of Friday. “It will probably be $1 million or more,” McArthur said. “We booked them on murder.” — Sandy Mazza may be reached by calling (562) 698-0955, Ext. 3026, or by e-mail at [email protected] local news?Sign up for the Localist and stay informed Something went wrong. Please try again.subscribeCongratulations! You’re all set! Michael Salinas, 20, a suspect in the Aug. 25 shooting of Aron Adagio, 30, a Downey videographer and sales representative, at the Pico Rivera convenience store, was arrested Wednesday by deputies serving a search warrant at his Azusa home. He was previously convicted of carrying a loaded firearm in November 2004. The third suspect in Adagio’s murder, Deanne Ariza, 22, of Santa Fe Springs, turned herself in to authorities Thursday. She has a past conviction, in January, for possessing illegal drugs. Detectives allege the three drove together in Ariza’s mother’s white Chevrolet Blazer to the 7-Eleven in the 9300 block of Slauson Avenue early in the morning on Aug. 25. After buying a case of Budweiser beer, detectives allege that either Jaimez or Salinas shot Adagio in the head. Adagio had simply stopped at the store to buy beer. He died later at a hospital. McArthur called the shooting “senseless.” PICO RIVERA — — Three suspects in the shooting death of a Downey man at a 7-Eleven store in Pico Rivera had previous criminal records, including gun violations, and one is implicated in a separate shooting, detectives said Friday. Suspect Michael Jaimez, 25, of Santa Fe Springs, who authorities have described as a gang member and records show has a criminal history dating back seven years, is named in a $300,000 warrant for his arrest on another shooting, said Sgt. Alex McArthur. Jaimez remains at large. However, McArthur said he could not provide details of that shooting, saying that investigation was being handled by the Whittier Police Department. Whittier police, however, were unable to provide any details Friday. According to records from Los Angeles Superior Court, Jaimez was convicted in 1998 of trespassing. In 2000, he was convicted of being drunk in public, possessing narcotics and taking a vehicle without the owner’s consent.