TAMPA — Police are searching for a shooter who killed a man and left a woman with life-threatening injuries on Saturday evening.The man killed was Larry Cotton, 43, according to a Tampa Police Department release. Frances Helms, 58, is in stable condition, police said.Officers responded to the 1800 block of N Nebraska Avenue after 7 p.m. and found Cotton and Helms suffering from gunshot wounds.Detectives believe the shooting was not random and ask anyone with information to contact Crime Stoppers at 1-800-873-TIPS (8477).