To answere a few questions: This gun is Reg. # 4687, Shipped May 9, 1939. It is one of about 150 RMs shipped with a 5.5" barrel. I have wondered if Det. Milczarek arried a 1917 before and that is why he selected this relatively rare barrel length.
Henry took leave of the department to go to war, then returned to the department. He was a championship swimmer and held the record of 28 nonstop swimming in the gulf. There is scant newsprint on him as the Galvestong paper (and a lot else) was destroyed by hurricanes. The GPD ws gracious enough to search their salvaged files to find Henry's photo for me.
Henry died at a relatively young age of throat cancer. I have wondered if he was gassed during the war.
I have no ide how the grips campe to be cracked. I can see no evidence that Henry cracked a lot of skulls with his sidearm.
Yes, in the 30's and 40's Galveston was a pretty rough place. My grandrather was a visiting judge there off and on during those years. Lot of drunken sailors, gambling, prostitution and the like.
Poisonous gas wasn't used during WW II.