In 2013, Brian Cooper was accused of sexually assaulting and killing Alisha Bromfield.
Convicting Cooper of sexual assault proved to be fairly simple. Unfortunately, the jury could not decide on the murder charge because he was drunk during the attack.
Bromfield's family is now trying to overturn a Wisconsin law which prevents a first-degree murder conviction when someone is drunk because "a killer's intent can't be proved if intoxicated," reports The Daily Mail.
Cooper allegedly strangled Bromfield because she refused to rekindle their relationship.
After Bromfield died, Cooper sexually assaulted her body. Bromfield was six months pregnant.
Both Bromfield and her unborn baby girl died in the attack.
According to Jury foreman Mark A. Hagen, the jury's main disagreement was over the meaning of a line in the instructions they were given.
The instructions read: "If the defendant was so intoxicated that the defendant did not intend to kill Alisha Bromfield, you must find the defendant not guilty of first-degree intentional homicide."
Cooper has never denied killing Bromfield, and his defense at trial was that the alcohol he consumed inhibited his ability to form intent.
"This bill is to eliminate voluntary intoxication as a defense for criminal liability," the post read.
The petition gained 6,300 signatures in 48 hours. It will go to the House, Senate, and the Governor of Wisconsin.
"Being drunk is no excuse for murder. We are trying to get a law passed that amends voluntary intoxication that it cannot be used as a defense for murdering," Sherry Anicich, Bromfield's mother, told CBS Chicago.
Cooper will be retried on murder charges for the deaths of Bromfield and her unborn child on May 5.