Police offered a one million baht reward for information leading to the arrest of the bomber.[21][22][23] On 20 August this was increased to two million baht by an anonymous Thai businessman,[24] and later to three million baht (US$84,000). A further two million baht (US$56,000) was offered by a prominent member of the Red Shirt movement and another two million by the son of former prime minister Thaksin Shinawatra, as well as five million baht (US$140,000) for "those officials who investigate and make arrests".[25][26] On 31 August, national police chief Somyot Poompanmoung awarded the three million baht to members of the police whose work led to the arrest of a suspect in the bombings.[27][28] This suspect later confessed to being the individual seen on CCTV in the first bombing. One million baht came from police chief Somyot and the rest came from his friends.[28] At the end of September 2015, police awarded themselves a second reward, essentially for making substantial progress in the investigation.[11]