The man who towed Casey Anthony's car gave key testimony Friday in the Prosecution's case against the Florida Mother accused of murdering her toddler daughter Caylee.

FOX News Radio's Eben Brown reports from Orlando:

Defense Attorney Jose Baez renewed his call for a mistrial, claiming the Prosecution was attempting to engage in character assassination of Casey Anthony based on her past conduct... and thus prejudiced the case.

Listen to what he had to say, HERE:

...Judge Belvin Perry denied the request:

On the witness stand, Mallory Parker... Fiancee of Casey Anthony's brother Lee... who got emotional when testifying about Casey Anthony's relationship with Caylee.

Listen to part of her testimony, HERE:

If convicted, 25 year old Anthony could face the death penalty.