Perez was put on administrative leave.
Dumel broke his legs in the crash. He was taken to Memorial Regional Hospital, where he underwent surgery.
Dumel told officers his name was Paolo Lafrance.
"It is believed that the defendant gave that name in an attempt to conceal his true identity," stated the arrest affidavit. "Defendant's license is suspended and defendant has a possible warrant for probation violation."
What police found
Property receipts show police recovered a firearm and magazine that police said Dumel threw out of the car when he first exited Ives Dairy Road. The receipt indicates the gun was fake.
Officers also found a white powdery substance resembling cocaine in Dumel's pocket, according to a police report.
Mayor promises thorough investigation
"As a mother, a sister and a wife, my heart goes out to the family of those killed in that accident," Opa-locka Mayor Myra Taylor said in a statement Thursday. "We will do a thorough investigation on our end. No stone will be left unturned. There will be no cover up. We will get to the bottom of this."
City Manager issues statement
Opa-locka City Manager Kelvin L. Baker, Sr. issued the following statement on Friday in regards to Wednesday's accident:
"Our hearts are broken by the loss of the four people who died in Wednesday’s tragic accident.
On behalf of the Mayor and Commissioners, our condolences go out to the parents and families of each of these individuals. This is a great loss for these families and for our community.
As civil servants in the Opa-locka community, we are dedicated to transparency and open communication with our residents and with our partnering agencies. We are working with multiple agencies both local and state to conduct a thorough investigation.
Our Police Chief Jeffrey Key is committed to gathering facts and combing through the evidence before presenting an objective report.
We encourage our community to join us in prayer for these families."