He noted that there was no witness in the case.
"A death sentence is reasonable if there is an eye-witness and strong evidence. They didn't have witness or strong evidence. We are preparing to appeal. Their mothers are crying heavily," he said.
The Samui district court today sentenced Win Zaw Tun and Zaw Lin to death for rape and murder. Both were arrested in October 2014 for the rape and murder of Hannah Witheridge, 23, and the murder of David Miller, 24 in the southern island. The two British backpackers were found dead on September 15.
Both were charged on seven counts including murder, rape, illegal trans-bordering, illegal stay in Thailand, theft, conspiracy to hide the evidence.
Lawyer Aung Myo Thant from the special team said: "We are going to appeal within seven days."
Representatives from Myanmar Embassy, Britain, labour forces and international media were present at the court today.