Word on the street has it that the 28-year-old singer has become Korea's public enemy #1 and nobody wants to be affiliated with him.
He faced police questioning at the weekend.
"We booked Seungri and changed his status to that of a suspect in order to issue a search and seizure warrant and clear [Seungri] of the suspicions", a police spokesman said (via Variety).
"During the past month and a half, I have received criticism and hate from the public and been in a situation where every investigative agency in this country is investigating me".
"As I've been branded as a "national traitor", I can not stand the fact that I'm harming others for my own sake", he added.
The search stems from leaked Kakaotalk messages from 2015 that are alleged to be between Seungri, CEO Yoo of Yuri Holdings, and a club employee. Many fans were left shocked after the news surfaced but some had called for him to leave Big Bang as the scandal snowballed.
Another member, rapper T.O.P, was handed a 10-month suspended prison sentence for marijuana use in 2017.
The allegations of sexual abuse at the Burning Sun nightclub were made by a man claiming to be a former VIP member.
I sincerely thank all of the fans in and outside of Korea who have given me lots of love for the past 10 years, and I think this is where I stop even if it's at least (to protect) the honour of YG and BIGBANG.
In 2011, band leader G-Dragon was investigated for smoking marijuana, which is illegal in South Korea, but was released without charge.
In the meantime, the military has said that Seungri's enlistment will not be postponed and he can continue to cooperate with the investigation during his service.