The leader of the coup to depose Labashi-Marduk was likely the courtier Belshazzar, who in Labashi-Marduk's place proclaimed Nabonidus, Belshazzar's father, as king. The sources suggest that while he was part of the conspiracy, Nabonidus had not intended, nor expected, to become king himself and he was hesitant to accept the nomination. Nabonidus's rise to the throne put Belshazzar first in the line of succession (it would not have been suitable for him to have become king himself while his father was still alive) and also made him one of the wealthiest men in Babylonia as he inherited Labashi-Marduk's family's estates.
The leader of the coup to remove Labashi-Marduk was probably the courtier Belshazzar, who in Labashi-Marduk's stead declared Nabonidus, Belshazzar's father, as king. The sources indicate that although he participated in the conspiracy, Nabonidus did not intend or expect to become king himself and was hesitant about accepting the nomination. Nabonidus' ascent to the throne placed Belshazzar first in line for succession (it would have been inappropriate for him to rule while his father was still alive) and also made him one of the wealthiest men in Babylonia as he inherited Labashi-Marduk's family estates.