Definition: Given a document, generate a short title of the document. The title should convey the main idea/event/topic about which the document is being written. Note that URLs in the text have been replaced with [Link].
Input: Federal investigators announced they were offering the reward after  58-year-old Tony Mosby  was killed while driving a mail delivery truck on Interstate 30 near downtown Dallas.
" He  was the rock of the family and part of that glue is gone. And I think that's what's going to help heal  his  children and  his  brother and  his  sister is bringing this person to justice " Sylvia Mosby  his sister-in-law  told FOX 4.
Dallas Police said in a news release that  Mosby  was shot around 2:30 a.m. just before the Margaret McDermott Bridge near downtown. When authorities arrived at scene  they found  Mosby  dead inside the cab of the 11-ton box truck that had crashed into a guardrail.
Family members described  Mosby  as a dedicated worker  who was a trustworthy father and grandfather.

Postal worker killed in Dallas highway shooting called 'rock of the family'