Batman is known for his "code" of not killing as he never wants to cross that line. Although he is completely okay with killing mindless aliens (in the comics, animated series and movies as well), he refrains from taking a human life.
In the main continuity however, Batman has committed murder quite a few times.
Batman actually started out in the first comics carrying a gun and regularly killing criminals by shooting them, strangling them, knocking them off buildings, into pits, etc. (some of his murders are listed here). Also, he killed The Joker in Frank Miller's very famous The Dark Knight Returns.
On screen, Nolan's The Dark Knight ended with Batman killing Harvey Dent/Two-Face. In Batman v. Superman: Dawn of Justice he does try to kill Superman (although "Martha" saves the day, Batman's intention of killing Superman was very clear). Moreover, if we count alternate timelines and variations of Batman across the multiverse (and Dark-multiverse), this list could go on forever.
However, all of these acts were intentional. But are there any instances where Batman has accidentally killed someone? Could be anything, in a fit of rage, accidentally throwing a Batarang at a wrong target etc.
Looking for answers across all media (comics, movies, TV series, animated series).