The answer to the question is that your social capital hasn’t expanded, or that you lost your chance to expand your social capital.
Social capital is defined as resources that an individual gain by interacting with other people, which can come in the form of tangible and non-tangible resources, such as monetary aid, information, and ideas. By not interacting with the police forces that were invited in the party, the individual in the question lost his chance to gain social capital to help him find a job in the criminal justice field.