HOUSTON (AP) — Three child welfare employees have been fired and additional investigators have been assigned to Travis County after a 2-year-old boy whose questionable care long had been known to authorities was found dead last month in a southeast Austin field, Texas Child Protective Services officials announced Thursday.

The actions come in the wake of the death of Colton Turner. The toddler’s mother, Meagan Work, 20, and her boyfriend, Michael Brandt Turner, 29, have been charged with tampering with physical evidence. Work is jailed on $256,000 bond. Turner is held on $250,000 bond.