This is the sort of story we’ve all heard so many times that it barely draws attention any more (via a report from Roll Call‘s Hannah Hess:

Capitol Police arrested a staffer for Rep. Tom Marino Friday morning on charges of carrying a 9mm handgun and magazine into the Cannon House Office building.

Ryan Shucard, the Pennsylvania Republican’s press secretary, was arrested around 9:15 a.m., according to Capitol Police spokeswoman Lt. Kimberly Schneider.

I’m sure we’ll soon learn that Shucard forgot he had his roscoe in his briefcase or whatever he was carrying into Cannon (which like the rest of the District of Columbia, bans Hand Cannons).

When we do, I’ll wonder what I always wonder in situations like this: How does one forget about a lethal weapon?

I mean, I’m as absent-minded as the next guy, and a lot more than most; as a teenager it took me about a year to notice my parents had put one of those terrifying Walter Keane Big-Eyed Children paintings in my bedroom (I screamed when I woke up one morning and finally noticed it). But I should hope to never forget about carrying a weapon that could end someone’s life. Perhaps this era of Open Carry is making people far too casual about it.

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Ed Kilgore is a political columnist for New York and managing editor at the Democratic Strategist website. He was a contributing writer at the Washington Monthly from January 2012 until November 2015, and was the principal contributor to the Political Animal blog.