Jose Aguilar was arrested in California last week. He's suspected of the manslaughter of nine month old, Serenity Reed.
KEPR obtained a mugshot of Aguilar from the website mugshots.com.
Richland PD confirmed Aguilar is a level one sex offender.
He was convicted back in the late 90's in Kansas for a crime known as "indecent solicitation of a child." The website indicates various aliases for Aguilar, but Richland PD could not confirm those.
Aguilar is due back in Benton County this week.