Howard County police are investigating a 22-year-old man's death early Friday afternoon after his motorcycle ran off the road and into a tree in Columbia.Police said Rommy Hesham Warrak, of Baltimore, was riding northbound on Samuel Morse Drive around 12:40 p.m. Aug. 19 when his 2003 Yamaha YZFR6 motorcycle left the roadway and struck a tree. He was pronounced dead at the scene, police said.Warrak was wearing a helmet at the time of the crash, and no other vehicles were involved. Police are continuing to investigate the crash, closing alternating lanes of Samuel Morse Drive.