Rick Ross Dog Murder Victory

TMZ broke the story ... the Yorkie, named Banks, died after several pit bulls escaped from Rick's Atlanta mansion back in April and tore Banks apart.

Banks' owner filed a lawsuit against Ross demanding more than $15k in damages and fees ... but today, a judge threw out the case ... saying Banks' owner failed to properly serve Ross with the suit.

Rick's manager tells TMZ, "We tried to do good business ... we paid the vet bill ... but it was an unfortunate accident that [Banks' owner] tried to capitalize off of."