<em>En la oficina, ellos </em><em>hablaron</em><em> de los casos de leyes que tenían</em>
hablaron is the conjugation of the verb hablar for the third person plural in the preterite tense. Recall that this tense is used to describe actions that took place or were completed at a certain point in the past. Therefore:
<em>In the office, they</em><em> talked </em><em>about the cases of laws that they had</em>
