other shows, which have really become more sadistic.' 'Even with television shows that started off benign, like America's Funniest Home Videos, eventually became more and more about people getting hurt,' he says. People have always been curious about the lives of others, but over the years 'dark and gruesome' curiosity has become more mainstream, Reiss says. The instantaneous gratification of pressing the 'share' button gives people who are willing to divulge an ample voyeuristic audience, the experts say. 'People will post things on Facebook and Twitter that ordinarily they may have never spoken about aloud.'

'For some reason, sharing something horrendous can give people a thrill,' says Prakash Masand, CEO of Global Medical Education, an online medical education resource focused on psychiatry. Hours before turning himself in, Medina allegedly acknowledged in a Facebook posting to killing Alfonso and moments later posted a photo of her bloodied body. On Thursday, Derek Medina turned himself in to police after his wife, Jennifer Alfonso, was fatally shot inside their home in South Miama, the Associated Press reports. 'We are just beginning to appreciate how it has been affecting our society.' 'In terms of people who are looking for publicity for good or bad reasons, or who are psychotic or feeling grandiose, (social media) presents an avenue (of self-disclosure) that has never been available before,' says David Reiss, a private practice psychiatrist based in San Diego.

A Florida man who allegedly killed his wife and then posted a photo of her corpse on Facebook dramatizes the growing role of social media in enabling disturbed people to put themselves on display, mental-health experts say.

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