Last June, we left undecided hereabouts the question of whether Tombstone stage operator Howard C. Walker was the same Howard C. Walker who later relocated to Mexico and was the father of Leo D. Walker, the fiery Carrancista newspaper editor in Laredo who in 1916 was arrested by a Texas Ranger and month later kidnapped by a vigilante mob and forced across the Rio Grande into Mexico.
Just posted in the December WWHA Saddlebag is part two of "A Story Retold is a Story Improved: Jovita Idar and the Texas Rangers," with new details about the arrest and who was among the mob. Howard C. Walker gets a mention in passing, but I'm still undecided on the possible Tombstone link.
https://wildwesthistory.org/#saddlebag