San Mateo police found a father, mother and two 4-year-old twin boys dead inside a home, in what appears to be a murder suicide, two sources told KTVU. Subscribe to KTVU's YouTube channel: https://www.youtube.com/channel/UCVhtkN7-c8mA8GXEoxS4YQw?sub_confirmation=1 KTVU delivers the best in-depth reports, interviews and breaking news coverage in the San Francisco Bay Area and California Watch KTVU's newscasts on https://www.ktvu.com/live Download KTVU's news and weather apps for free at https://www.ktvu.com/mobile-apps Subscribe to KTVU's newsletter at https://www.ktvu.com/newsletters Follow KTVU on Facebook: https://www.facebook.com/ktvu Follow KTVU on Twitter: https://twitter.com/KTVU Follow KTVU on Instagram: https://www.instagram.com/ktvu2/