Mystery as stunning influencer vanishes without a trace after attending Christmas party as cops find blood in home

A STUNNING influencer has mysteriously vanished after failing to show up for work – and cops now fear her boyfriend could be at the centre of the chilling disappearance. Stefanie Pieper, 32, failed to show up for a photoshoot on Monday, prompting the worried photographer to visit her home in Graz, Austria to check on…