KANSAS CITY, Mo. -- Police released dash cam video Monday from the night Lisa Irwin disappeared.
One police car reached speeds of up to 73 mph on his way to the Irwin home.
He radioed dispatch for details.
Another patrol car showed up to help search, even using a spotlight to brighten dark areas.
Lisa was reported missing on Oct. 4, 2011, at 4 in the morning.
Police have followed up on hundreds of leads, none of which have panned out.
Lisa was 10 months when she disappeared.
Watch the video here: http://bit.ly/zrwegw