Stolen art can be lost for decades . Soft targets like museums entice thieves , experts say . Stolen Rockwell found in Steven Spielberg 's collection decades after theft . Comment: The most common way to get a painting stolen is by someone who knows the owner and has access to their home or office.
Stolen art can be lost for decades . Soft targets like museums entice thieves , experts say . Stolen Rockwell found in Steven Spielberg 's collection decades after theft . Nothing glamorous about art thieves , expert says .