48 Hours

Addicted to Love (21x16)

Air date: Feb 16, 2008

Lesa Buchanan died on the Fourth of July weekend in 2005, after spending a good portion of time with her boyfriend, Dr. Christ Koulis, having sex. Koulis, a plastic surgeon, called 911 when she stopped breathing, and says he performed CPR but that there was no pulse. Investigators quickly focused on drugs. Prosecutors allege Dr. Koulis had injected Lesa with a powerful painkiller during the course of the weekend, which eventually led to her death. But Koulis claims Lesa injected herself, and that she had a drug problem - a claim her family and investigators have disputed. As correspondent Troy Roberts reports, the case ended up in the hands of a jury, who had to decide if the doctor was responsible for his girlfriend's death.