Sandoval died at the scene after being flung more than 75 feet, police said.
Grigoryan had apparently flown to Mexico City from Tijuana, possibly on Friday, where immigration authorities there detained him because of problems with his travel documents.
Through U.S. Immigration Customs Enforcement and the Department of Homeland Security, Mexican authorities discovered Grigoryan's outstanding warrant and detained him for deportation.
Authorities believe Grigoryan had planned to return to his native Armenia.
He will likely face felony hit-and-run charges and may also be charged with vehicular homicide, depending on how the Los Angeles County District Attorney's Office decides to proceed. A six-hour Glendale Police SWAT standoff with a 26-year-old Tujunga man at a home he was allegedly caught burglarizing Monday ended after officers used tear gas to temporarily subdue him.
A special weapons team arrested Jerome Antonio Wilson, who was found hiding in a storage room adjacent to a home on the 1100 block of Avonoak Terrace.
No one was home at the time of the incident.
Wilson was reportedly caught exiting the house at about 11 a.m. by Glendale Police officers responding to a call from an alarm company. That's when police say he ran back inside the house — forcing the standoff.
Police eventually used tear gas to subdue him.
GE Energy Financial Services, the energy investing arm of the General Electric Co., announced Tuesday that it has acquired a 90% interest in the private partnership that operates the Scholl Canyon Landfill gas project in Glendale.
The deal makes GE Energy Financial Services the leading stakeholder in the project, which is co-owned by Scholl Canyon Landfill Gas Corp., a division of Massachusetts-based Palmer Capital Corp.
Few financial details about the transaction were disclosed, but a deal has been in the works since the end of last year, officials said.
Glendale Water & Power purchases the landfill gas for a price that is nearly double the cost of natural gas.