Why Did Derek Rosa Kill His Mom?

A story out of Miami-Dade.

Derek Rosa was 13 years old and living in the Miami-Dade area in October when he apparently went into his mother’s room with a kitchen knife and killed her, as seen on a baby-cam frame above. His case has not gone to trial yet, but there’s also now video of him admitting it to cops — and being rather calm in the process.

Here’s some crazy video.