Kevin Tomafsky, 43, of Washington Township, pleaded guilty on Monday to first-degree endangering the welfare of a child.

The Contra Costa District Attorney's Office charged Rustom Bhagwagar and Jennifer Powell each with more than a dozen felonies, including counts of engaging in a sexual act with a child 10 years old or younger, oral copulation with a child, forcible lewd acts upon a child, and aggravated sexual assault of a child.