Testimonies, arguments and evidence have been heard over the case where the embattled vice chairman is challenging his suspension from the party which happened in October 2015.
An Accra High Court has set June 2 to deliver its verdict in the case.
Crabbe's case proceeded to court months after his suspension by the National Executive Council of the Party claiming some violation in the rules of the party's constitution.
In the suit the suspended vice chair is challenging the locus of one of the members of the disciplinary committee which took the decision to suspend him.
The case had suspended chairman of the party Paul Afoko testifying as a witness for the plaintiff. In his testimony Mr. Afoko claimed the inclusion of Madam Gifty Kusi as a member of the disciplinary committee of the NPP was illegal as she was not properly appointed.
Crabbe is in court challenging his suspension by the disciplinary committee of the Danquah-Busia-Dombo tradition. He argues that some of the members of the committee who voted in support of his suspension are not legitimate members of the committee.