Eadweard!

Admittedly, Wikipedia makes for a poor scholarly resource, but look!:

In 1874, still living in the San Francisco Bay Area, Muybridge discovered that his wife had a lover, a Major Harry Larkyns. On October 17, 1874, he sought out Larkyns; said, "Good evening, Major, my name is Muybridge and here is the answer to the letter you sent my wife"; he then killed the Major with a gunshot.^[2]

Muybridge believed Larkyns to be his son's true father, although as an adult, the son bore a remarkable resemblance to Muybridge. Muybridge was put on trial for murder, but was acquitted as a "justifiable homicide." The inquiry interrupted his horse photography experiment, but not his relationship with Stanford, who paid for his criminal defense.

An interesting aspect of Muybridge's defense was a plea of insanity due to a head injury Muybridge sustained following his stagecoach accident. Friends testified that the accident dramatically changed Muybridge's personality from genial and pleasant to unstable and erratic. Although the jury dismissed the insanity plea, it is not unlikely that Muybridge had experienced emotional changes due to brain damage in the frontal cortex, often associated with traumatic head injuries. {For a description of Muybridge's suggested neurological injury, see Shimamura, 2002.)

After the acquittal, Muybridge left the United States for a time to take photographs in Central America, returning in 1877. He had his son, Florado Helios Muybridge (nicknamed "Floddie" by friends), put in an orphanage. As an adult, Floddie worked as a ranch hand and gardener. In 1944 he was hit by a car in Sacramento and killed.^[3]