(Vancouver, WA) -- New details are coming to light regarding the murder of a transgender teenager who was reported missing in June. The Vancouver Police Department says they don't believe the murder of 18-year-old Nikki Kuhnhausen was premeditated. Police have arrested 27-year-old David Bogdanov on a charge of second-degree murder for her death. Investigators believe Bogdanov killed Kuhnhausen after she revealed to him that she'd been born male. The two had reportedly been talking on Snapchat and had agreed to meet up on June 6th, which was the last day Kuhnhausen was seen alive.