According to police, the couple had been fighting earlier in the day on the lake at a family gathering.
A YouTube video shows Robert Pratt had a run in with Cassaundra’s father, Public Safety Officer James Pell, just months before the shootings. In the videos, Pratt expresses his passion for open carry gun laws.
In another video on Pratt’s account, he has an altercation with police and they question his behavior and the safety of his mother.
Robert Pratt’s record shows an arrest for burglary in 2005.
Friends of Cassaundra Pell say there will be a vigil for her Wednesday at Pell Park in Plainwell at 10 p.m.