Authorities Thursday were questioning the three men guarding a drug suspect who fell to his death Tuesday, in what police say was a suicide.
The men guarding Oum Chhay, a key suspect in a drugs production case, said they were unable to prevent the accident.
The guards had accepted responsibility for failing to prevent the suicide and were willing to accept demotion or jail time, said Interior Ministry spokesman Khieu Sopheak.
"We did question them. We asked them individually.They admitted that the accident happened so fast and they accept responsibility," he said.
Police said previously Oum Chhay lept from the building while his guards were away using the toilet.
The punishment of the three guards was not yet determined, Khieu Sopheak said.
Oum Chhay's death has weakened an investigation into a methamphetamines lab raided by police in April.
Another leader in the drugs production case, Chea Chong, is being held in Prey Sar prison, undergoing questions, police said.