I-270 SHOOTINGS Police have suspects, official says

Names are regularly added to or taken off the suspect list, the chief deputy said.
COLUMBUS (AP) -- Authorities investigating a series of highway shootings said Friday they have an undisclosed number of suspects who have not been eliminated as the possible sniper through various investigative techniques.
Of more than 2,800 tips called in about the 18 related shootings, 582 have identified people whom the callers believe should be investigated, Franklin County sheriff's Chief Deputy Steve Martin said. Some of the people identified in the calls have been elevated from "persons of interest" to suspects, but Martin would not say how many.
Once a person is labeled a suspect, investigators use more intense techniques to try to rule them out, including interviews, lie-detector tests and surveillance, Martin said.
Names are regularly added to or subtracted from the suspect list, he said.
"The process is fluid and changes from day to day," he said.
No arrests yet
No one has been arrested in the shootings along the southern stretch of Interstate 270, including one that killed a 62-year-old woman on her way to a doctor's appointment last month. Most occurred within the past two months.
Seven of the shots, including the only fatal one and two fired into homes, came from the same gun. The others are considered connected by location and other circumstances, investigators have said.
Multiple callers -- up to five or six in some cases -- have identified the same person or group of people, although Martin would not say how many times that has happened.
A reward offered by local businesses has been increased from $20,000 to $60,000, Martin said.