BELLEVUE, Neb. (AP) -- Authorities filed additional charges Monday against a 23-year-old man in a shooting at a Nebraska fast food restaurant in which two employees were killed and two others were wounded.
Roberto Carlos Silva Jr. faces two counts of first-degree murder, two counts of attempted first-degree murder, arson and four gun charges in Saturday's attack at a Sonic Drive-in restaurant in the Omaha suburb of Bellevue. The Omaha man was being held without bond ahead of his first scheduled court appearance Tuesday.
There was no indication Monday that Silva had a lawyer who could comment on his behalf.
Bellevue police officers found a U-Haul truck on fire outside the restaurant around 9:30 p.m. Saturday when they responded to the shooting and found the four victims. Silva was unarmed when he was arrested nearby shortly after the shooting, but police found four guns at the restaurant.
Investigators are still trying to determine Silva's motive, Chief Deputy Sarpy County Attorney Bonnie Moore said Monday.
Silva was arrested outside the same restaurant last Wednesday for allegedly using someone else's Sonic app to purchase $57 worth of corn dogs and hamburgers. He was released from jail Thursday after posting $150 bond. Officials seized three firearms from Silva at the time of that arrest.
Authorities have identified the two employees who were killed in the shooting as Nathan Pastrana, 22, and Ryan Helbert, 28. The two employees who were hospitalized are Zoey Reece Atalig Lujan, 18, and Kenneth Gerner, 25. A fifth Sonic employee suffered a minor injury but declined treatment.