Yes, this is correct.
I was a close friend to fr. Malachi Martin, and at the time was webmaster for his website. Fr. Malachi called me and he was weeping as he told me of the death of Fr. Kunz and asked that I pray for him. As per Fr. Malachi, Fr. Kunz was an undercover agent for Rome who was investigating satanic pedophilia in the Church. Fr. Malachi went on to say that this murder will be covered up because the satanic group responsible had connections at the highest levels of government law enforcement. He said that this had happened to several other priests in the same manner who were also undercover agents for Rome.
Fr. Malachi himself met his demise under very suspicious circumstances. Please pray for both Fr. Kunz and Fr. Malachi.