In the wake of the death of David Rozga, an 18-year-old youth who killed himself while using a marijuana-mimicking product called K2, many are calling on the government to ban synthetic substances designed to replicate the effects of pot. These substances, which go under brand names such as K2, Spice and others, are legal and can be purchased for $15 to $85. While most retailers say they won’t sell these products to anyone under the age of 18, there’s no legal age restriction. Rozga bought his at a local mall. Shortly thereafter, his parents and girlfriend noticed changes. “He just continued to become agitated—indicating that he felt like he was in hell,” his father, Mike, said. Others have had problems with the synthetic pot, to In 2010, poison control centers recorded more than 4,000 calls related to the drugs. (ABC News)