What’s the reason behind South Korean singer Wheesung death?

South Korean singer Wheesung, 43, was found dead on Monday at his home in Seoul, South Korean police announced.
In details, authorities revealed that the South Korean star was found in a state of “cardiac arrest. They added that his body wasn’t discovered immediately but it was recovered after a “significant amount of time”.
The police in South Korea further mentioned that there were no signs of criminal suspicion in the scene, which means that the singer was not killed.
Many rumors emerged on social media regarding the death of singer Wheesung as many claimed he could have died of drugs as they based their allegations on the fact that the Korean star was handed a two-year suspended sentence for abusing propofol.
However, the real reason behind his death is still unknown or unannounced by the police in South Korea.
The singer was expected to hold a concert with ballad singer KCM this weekend in the city of Daegu.