You are correct in the assumption that Peter Hackett is requesting the Judge dismiss the case. I believe though that they have enough circumstantial evidence for the case to move forward to trial. I feel that if a jury of 12 unbiased individuals heard this case that they would hold Peter Hackett liable for the wrongful death of Shannan Gilbert.
The case of Gilbert, Shannan, Estate of, vs. Hacket, Charles Peter, D.O. is the only way that the courts can be used to allow an independent investigation into the death of Shannan Gilbert and the LISK victims overall. It is right now the only way that an independent investigation has the means to try to force SCPD to share evidence and information. Once this case is dismissed the release of information and evidence rests solely at the discretion of SCPD.
The SCPD's investigation is not affected by the dismissal of the civil case against Peter Hackett. It will benefit them in that there will no longer be a basis for Shannan Gilbert's 911 call to be released, which will save them embarrassment and possible civil liability.
If the case against Peter Hackett were to be dismissed then any investigation will fall completely to SCPD. They will continue to combine Shannan Gilbert's case into the overall LISK investigation, in which they have already cleared Peter Hackett, Michael Pak and Joseph Brewer.