NX-Files

http://www.dailymail.co.uk/news/article-1369919/Veterinarian-shoots-dead-pregnant-mistress--wife-wont-affair.html

^ in the news article above, a thirty year old veterinarian murdered his pregnant mistress to stop his wife from finding out.  
The vet will probably spend the rest of his life behind bars.  This case is sad on multiple levels, but what struck me was the waste.
The guy obviously had passion given the hours of study and cost involved to become a vet, and at thirty he was just starting his professional career.  He probably would've gone on to service the community for the next thirty to forty years.  
So all that hard work, passion, and potential was overridden by sex and pride.