i'm also trying to figure out the logic in it.as far as i know, dog is against carrying a gun. so it's not like he's a threat against them in that way...
if i had to take a guess, i'd say they figured his experience with fugitives lends itself to making him a possible flight risk. or maybe because he has previous prison time (i believe he said he murdered someone, even tho his wiki entry says he was convicted in stuff *related* to a murder, but at any rate definitely served time in TX) he's considered dangerous.
i really can't figure it out entirely. because even if HE is considered a risk due to his record, surely his SON doesn't have such a record. his wiki mentions no prison or arrest record.
it just doesn't seem to make much sense.
~ cqc