"We have suspended constable Shankar Sethi for dereliction of duty for which the murder accused escaped from the police lock up," said SP (Ganjam) Narsingh Bhol.
The constable was on duty when the incident took place last evening, Bhol said.
Santosh Gouda of Kirapalli village under Bhanjanagar police station limits was detained in the police station since Sunday in connection with the murder of one Bharati Sahu (32) on May 23. The body of Bharati was recovered from Budhakhol jungle on May 27.
A search operation has been launched to trace the accused and all nearby police stations have been alerted, he added.