I feel like Tariq is going to have to admit in open court that he killed his pops. The video of his confession is still out there even if it’s inadmissible. Tariq isn’t on trial, so there’s nothing stopping anyone from going after him if Tasha’s case gets thrown out.
Of course the case is going to get thrown out before it even gets to that point. All Davis or Saxe gotta do is mention that they talked to Tameka about the case off the record. That would help cover up the plothole in why Blanca let Saxe mess up her career when she saw him at Truth that night.