We turn to the mysterious killing of a prominent law professor at Florida state university. Police are convinced it's a murder case but so far no good leads so they're asking for the public's help.... See More
We turn to the mysterious killing of a prominent law professor at Florida state university. Police are convinced it's a murder case but so far no good leads so they're asking for the public's help. ABC's Matt Gutman has the story. Reporter: This morning, police are scrambling to unravel the riddle of who killed professor Dan Markel. We do believe this was not a random act where he surprised somebody. What we do believe Mr. Markel was the intended victim. Reporter: Markel was shot in this quiet development. The divorced 41-year-old was the 2k0e9ing dad of two boys. And they were certainly his pride and joy. Reporter: A college professor ir, a legal scholar, a Harvard grad published in "The New York times," he spoke at this conference in 2012. The sensing issue is disassistant. Reporter: His ex-wife, fellow professor said through her lawyer that she is just devastated and scared to death. Police say Markel apparent ly opened the door to his kill sfler any time there is a robbery or burglary most people don't have the keys to the house. There was no sign of forced entry. A key clues says. It means he knew the killer and police responded after neighbors heard a loud bang. He was pronounced dead at a loud hospital. The paper reports that a single gunshot to the back. Police say they're short of clews and opened a tip line hoping to provide the kind of justle Markel sought for other. There probably are two people in this world who know exactly where Mr. Markel was injured, one of those would be Mr. Markel himself and the other would be the suspect in this case. Reporter: For "Good morning America," Matt Gutman, ABC news, Miami.
This transcript has been automatically generated and may not be 100% accurate.