Mr Watana, according to security sources, confessed that he went to the hospital to survey the scene several times in April before planting the bomb. The investigators also interviewed a patient who confirmed Mr Watana's visit to the hospital. Since Mr Watana was seen in the footage, investigators secretly followed Mr Watana's movements for 24 days. Mr Watana often left home to visit his second wife at her condo. Prosecutors will ensure justice for the suspect and ensure he has the right to request bail, Mr Natthachak said.

Source: Bangkok Post August 23, 2017 23:15 UTC