It was initially called in as a fireworks accident. Police soon discovered it was a shooting.
According to police, Blair is a relative of the homeowner who runs a foster care facility.
The home is surrounded by trees. Police believe the shot was fired outside the property.
Police spent several hours canvassing the neighborhood Tuesday afternoon.
"It is complicated but not impossible. The detectives work very hard. It only takes of couple of pieces of the right information to kick it off and that's what we are hoping for," said Capt. Steve Young.
Cindy Gaydusek was outside with her children and grandchildren when the shooting happened.
"That's really sad. It could have been any of our children and that's what's kind of scary to me. You're in your yard thinking you're safe and you're not really safe there either," she said.
Blair was pronounced dead at approximately 5 p.m. Tuesday. There are no suspects in custody and anyone with information about the shooting is asked to call the Tips Hotline at 816-474-TIPS.
A memorial has been set up for Blair.
The Blair Shanahan-Lane Memorial Fund
Blue Ridge Bank & Trust
6202 Raytown Trafficway
Raytown, MO 64133
Her parents have asked that donations be made to the memorial fund to offset the medical costs in lieu of flowers.
The funeral will be held Saturday at Lee's Summit United Methodist Church located at 114 SE Douglas Road in Lee's Summit.
Visitation will be held from 9 a.m. to noon and the funeral will follow at 1 p.m.