LONDON: An HIV-positive man in US has potentially infected thousands of people — by having unprotected sex so he could spread the disease, according to a media report.David Dean Smith, 51, turned himself in to a Michigan police station last week — after claiming to have slept with 3,000 men and women over several years. A detective investigating the case said: “He says he intentionally attempted to spread the disease to kill people” . It is unclear when Smith was diagnosed with HIV, but he claims to have known full well what he was doing when he had unprotected sex with many partners.While he claims that there may be thousands of victims, so far he has been arraigned and charged with two counts of AIDS-sexual penetration with an uninformed partner, ‘Daily Mail’ reported.