Andrew Tate has appeared at a prosecutors' office for a second day as forensic searches of his confiscated phones and laptops continue.
The controversial influencer, 36, is suspected of being involved in human trafficking and part of an organised crime gang.
Tate's brother Tristan and two Romanian women have also been detained in the same case.
As the brothers arrived handcuffed together on Thursday morning at the Bucharest offices of the Romanian Directorate for Investigating Organised Crime and Terrorism (Diicot), Tristan Tate told reporters: "What evidence is there? There is none.
"That should be the story. Please cover that story. The police have fabricated the evidence. There is no evidence. There is no victim."
Andrew Tate told reporters as he left the offices on Wednesday: "There is no evidence in my file because I've done nothing wrong."
Diicot spokesperson Ramona Bolla said it was taking time to go through the "multiple devices" seized.
The brothers will remain in detention until late February after a judge on Friday granted a request to extend their detention by 30 days for a second time.
The former professional kickboxer, a British-US citizen with nearly five million Twitter followers, is believed to have lived in Romania since 2017.
He was previously banned from several social media platforms for expressing misogynistic views and hate speech. But his following has increased by at least several hundred thousand on Twitter since he was arrested in late December.
After the arrests, Diicot said it had identified six human trafficking victims subjected to "acts of physical violence and mental coercion" and sexually exploited by the members of a crime gang.
Diicot said the victims were lured with pretences of love but later intimidated, kept under surveillance and subjected to other control tactics while being coerced into engaging in pornographic acts for considerable financial gains.
Romanian authorities also seized assets worth more than £3m including a blue Rolls-Royce, a Ferrari and a Porsche earlier in January.
Tate unsuccessfully appealed the asset seizure.