Police in California arrested a 71-year-old man after surveillance video allegedly showed he suffocated his 94-year-old father-in-law.

Sy Van Nguyen died Aug. 11 at his Santa Rosa home in the 5800 block of River Road, 65 miles north of San Francisco. Paramedics initially considered the death natural, the Sonoma County Sheriff's Office said .

But on Friday, the victim's son came to deputies with evidence. Nguyen had surveillance cameras in his bedroom, and following his death, his son felt something was suspicious and watched the video.

Love true crime? Sign up for our newsletter, The Law&Crime Docket, to get the latest real-life crime stories delivered right to your inbox.

"As he's reviewing it, he saw the suspect basically grab a plastic bag and a pillow, put it over the victim's face

See Full Page