On a chilly evening in early March of 1873, Louis HF Wagner concocted a plan to rob his former employer. When a pup startles the household awake, the night takes a dark and twisted turn.

Sources:

http://www.seacoastnh.com/History/History-Matters/why-louis-wagner-was-smuttynose-slayer/?showall=1

https://newengland.com/today/travel/new-hampshire/portsmouth/smuttynose-murders/

https://www.fosters.com/news/20200308/blood-science-on-trial-in-1873

https://www.jstor.org/stable/3303455?seq=1#metadata_info_tab_contents