Trepova allegedly admitted to detectives that she was used as a carrier to transfer the explosive device but that she was unaware that it was concealed in the bust
The teenage girl and her boyfriend arranged to have her mother killed after the told the latter to leave the house because he was a "bad influence" over her daughter.
Tatarsky, a vocal supporter of the conflict in Ukraine, was assassinated when he was leading a discussion at a cafe on the Neva River's bank in the city's historic center.
Raul Alexander Cuevas, 31, was arrested a day after his mother was stabbed to death after the prime suspect in her murder was found dead with stab wounds.
The former president is due to be arraigned at the courthouse Tuesday afternoon, after his indictment in a grand jury probe over hush money paid to a porn star.
Commenting on the removal of The New York Times' Blue Badge, Musk tweeted: "The real tragedy of @NYTimes is that their propaganda isn't even interesting".