 The two claimed to have not left the apartment after the meeting with Li (which was contradicted by eyewitnesses’ testimonies who said Li had been seen elsewhere during the time of the purported meeting with the two.While the two denied any involvement in the murder, police made a successful DNA match and issued an arrest warrant for the two on suspicion of joint murder.Ramona S., the mother of the accused, and her partner, Jörg S., both police officers, came under general suspicion of covering up evidence of the murder in the couple's apartment.