TAIPEI, Mar 7 (AP) -- Investigators said Monday they've identified the "most likely suspect" who fired a shot that slightly injured Taiwanese President Chen Shui-bian one day before he was narrowly re-elected last March.

But the suspect, Chen Yi-hsiung, died shortly after the March 19 shooting and police thought it was a suicide because he prepared a will just before his death, said Hou You-yi, head of the Criminal Investigation.

"We investigated 119 suspects ... and Chen Yi-hsiung was the most likely suspect," Hou told reporters.

Hou said video footage shot before the shooting put Chen Yi-hsiung at the scene and an extensive investigation of the weapon used traced it back to the suspect, who purchased his handgun shortly before the shooting.