The governor of Jakarta, Pramono Anung, also visited Mr Kurniawan's family, expressing condolences and offering financial assistance for funeral arrangements.
On Friday, seven members of the Mobile Brigade Corps (Satbrimob) were "found to have violated the police professional code of ethics".
As the day went on, tensions ramped up, with protesters trying to block a police convoy and throwing rocks at the vehicles.
The crowd continued to grow, as students from the local Pertamina University arrived.
Earlier, protesters had put up a banner on a nearby pedestrian bridge that read "arrest the damn officers".
In Kwitang, an area of central Jakarta, tensions rose as the protesters marched to the road in front of the Indonesian National Police headquarters in Kwitang, central Jakarta. Earlier, they had been blocked by the marine and army squad.
Police fired tear gas at protesters from inside the station, with protesters also attempting to block a police convoy and throwing rocks at the vehicles.
Despite heavy rain, some protesters threw Molotov cocktails and firecrackers towards the police compound, the BBC's partner in Indonesia, Kompas, reported.
Protests were also seen taking place outside of Jakarta in Jawa Barat, Surakarta, Bandung and Medan.
Dozens of vehicles were also set alight, the state news agency reported.
Drone footage of Mr Kurniawan's funeral showed thousands of riders turning out in support, some on foot and others on their vehicles - many dressed with the distinctive green of their employer Gojek, a multipurpose app that includes ride-sharing services.