Police say the SUV's driver was 16-year-old Andre Butler and that he had stolen the vehicle.
He's now charged as an adult with third degree murder.
Nazario's partner, Terry Tull, was behind the wheel of the police cruiser.
He has been hospitalized since the crash.
"I'm told he's sitting up now. He's in a lot of pain, broken hip, several broken ribs. He wants to come to the funeral Friday. I don't know if it will be allowed in terms of his doctors," said Police Commissioner Charles Ramsey.
The city will begin saying goodbye to Officer Nazario on Thursday.
A viewing will be held from 6:00 to 9:00 p.m. at Givnish Funeral Home on Academy Road in Northeast Philadelphia.
A second viewing will begin at 7:30 Friday morning at the Cathedral Basilica of Saints Peter and Paul.
That viewing will be followed by a funeral mass at 12:00 p.m.
Officer Nazario will be buried in Puerto Rico.
A memorial fund has been set up for Officer Nazario's family.
It's asked money would be sent to the trust fund at: 901 Arch St., Philadelphia, PA 19107.
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