She apologized to the victims and asked that the case be sent for further investigation.
According to Trepova, she was sure that there was a listening device in the figurine, RIA Novosti reports.
Previously, the prosecution requested 28 years of imprisonment in a general regime colony for Trepova.
The terrorist attack occurred on April 2 in the Street Bar cafe on Universitetskaya Embankment in the center of St. Petersburg.
As a result, a military commander died, and 42 more people sought medical help.
* Included by Rosfinmonitoring in the list of persons and organizations in relation to which there is information about their involvement in terrorism.