PUNTA GORDA, Fla. -- The husband of a 21-year-old mother who was kidnapped, raped and killed plans to sue a southwest Florida sheriff's office that he said botched the investigation.

Nathan Lee said Thursday that "severe incompetence" kept Charlotte County sheriff's officials from saving Denise Lee after she was abducted in January, even after a 911 call described the precise location of the car carrying her and the man accused of abducting her.

Lee said the goal of his planned lawsuit is to ensure that 911 dispatchers have proper training.

"I want to make sure that somebody else isn't going to have to tell their kids that that their mom could have been saved if the proper training was put in place," Lee told NBC's "Today" on Friday.

Denise Lee was the daughter of a Charlotte County sheriff's sergeant.

Nathan Lee claims the agency failed to dispatch a deputy to respond to an emergency call from motorist Jane Kowalski, who called 911 on her cell phone.

Kowalski thought she might be witnessing a child abduction when she saw someone inside another car screaming and banging on the window. She was actually describing Lee with her alleged captor, Michael King, shortly before she was killed. King was arrested later and charged with murder.

Three other 911 calls regarding the abduction, one from Lee herself, were routed to the Sarasota County emergency center. But because Kowalski had crossed the county line, her call was routed to Charlotte County authorities, who did not dispatch a deputy.

After an internal investigation, Charlotte Sheriff John Davenport briefly suspended two 911 center workers and ordered remedial training.

Lee's attorney gave the sheriff's office the six-month notice required by state law before suing a government agency. He said he will pursue a settlement.

Sheriff's spokesman Bob Carpenter said Friday the agency has a policy against commenting on pending litigation.