Ottawa ? Four people conspired to kill a witness in a Lawrence aggravated-battery case just hours before he was scheduled to testify, Franklin County prosecutors alleged Thursday.

“I don’t think this was a coincidence,” County Attorney Heather Jones said.

Three of the four suspects were charged Thursday, 10 days after police found Ottawa resident Michael Miller in the middle of the street outside his home with gunshot wounds. Miller is stable and recuperating at an undisclosed hospital.

Prosecutors charged Lawrence residents Lisa K. Winter, Kay F. Gaillard-Taylor and Jeffrey A. Campbell on counts of attempted first-degree murder and conspiracy to commit murder.

According to the charges, the three defendants and another person who has not been charged or arrested drove to Miller’s house in Ottawa, lured him from his home with a handgun and shot him.

Prosecutors wouldn’t say who they thought fired the weapon. However, the charges name Campbell, Gaillard-Taylor and the fourth suspect as the only people in the car at the time of the shooting.

Campbell, 29, is on probation for attempted battery against a correctional officer while he was incarcerated in 2004, state records show.

He also has been convicted of aggravated battery, aggravated arson and attempted theft, records show. He was released from Douglas County Jail in September.

The three defendants are scheduled to make a first appearance in court Wednesday, Jones said.

The investigation so far has spanned three police departments – Lawrence, Ottawa and Overland Park – and involved interviews with dozens of witnesses, family members and employees of several local businesses, records show.

Although the county has not filed charges against the fourth person allegedly involved in the shooting, Jones said her office continues to review the case and could file more charges.

Miller was shot Dec. 19, the night before he was scheduled to testify against Lawrence resident Louis G. Galloway, 43, in Galloway’s aggravated battery trial.

Galloway was charged with battering Miller last year in an alleged home burglary at Miller’s former home in Lawrence.

Jones said Franklin County did everything it could to protect witnesses before trials, but defendants often have access to witnesses’ names and addresses during the legal process.

“There’s some of that we can’t control, by law,” Jones said.