WORCESTER, Mass. - One of two suspects in the shooting death of Chastity Nuñez and her 11-year-old daughter Zella was in court Tuesday for a dangerousness hearing, where his charges were upgraded.

Karel Mangual, 28, pleaded not guilty to two counts of murder and was ordered held without bail.

Mangual appeared in court out of view behind a door. His charges stem from the shooting deaths of Nuñez and her daughter, who were killed last Tuesday while sitting in a parked car in the area of Lisbon Street and Englewood Avenue.

Worcester County District Attorney Joseph Early said both Mangual and Dejan Belnavis, 27, are facing murder charges. Mangual had initially only been charged with armed assault to murder and carrying a firearm without a license.

“They’re putting together a solid case, they brought a lot of different stuff,” Early said. “It’s never at the beginning ‘You don’t want to charge,’ but you can only go with what you have. Our rules say you can only charge with what you feel you have reasonable cause to prove, and we’re comfortable with these charges right now.”

Prior to Mangual’s court appearance, Belnavis was arrested in San, Diego California. While authorities couldn’t say whether he was attempting to flee to Mexico, Worcester Interim Police Chief Paul Saucier said authorities were able to track his whereabouts.

“We’re using law enforcement technology with the aid of U.S. Marshals and the state police, we were able to locate him,” Saucier said. “We were able to basically pinpoint where he was going to be.”

“This was shoe leather on the ground, boots on the ground, and good old-fashioned police work,” Early added. “Tips, everyone was communicating, it was just a great effort.”

Family was notified prior to the announcement of Belnavis’ arrest Monday evening, and local leaders hope this can begin some form of closure for the family and the greater community.

“It’s been a tough week, it’s been a tough week for a lot of people,” Early said. “You never expect or anticipate anything like this. Worcester is a safe city and a safe county compared to a lot of other counties. When you do get something like this, it really jolts you, it really hits you hard, especially anyone who has children.”

“I think it’s incredibly important now that we pray for the family so they are able to have some closure, some peace and some healing as we move forward,” said Kate Toomey of the Worcester City Council.

Authorities are unsure when Belnavis will be extradited back to Massachusetts, but Saucier was grateful they were able to apprehend him without incident.

“We knew we had to bring this to a successful conclusion, because this isn’t Worcester,” Saucier said. “This is not a violent city. We have our challenges as everyone does in a city, but besides that, the men and women of the Worcester Police Department are out there every day putting in 110 percent so we can live in a safe community.”