Successful real-estate firm built between grisly crimes

WOODRUFF, S.C. -- As he built a successful real estate firm, Todd Kohlhepp's behavior struck some as odd: watching pornographic videos during work, making macabre jokes in marketing literature and openly discussing that he was a sex offender.But he was also an award-winning agent described as a hard worker and good boss.All the while, authorities say, he was hiding a grisly secret that included seven killings over 13 years. He gunned down four people at a motorcycle shop in 2003 and within the l