CA Unemp Ins Code Section 13070

(a)

The employer shall be liable for the payment of the tax required to be deducted and withheld under Section 13020, and shall not be liable to any person for the amount of such payment.

(b)

Whenever any employer or person has withheld any amount pursuant to this division, the amount so withheld shall be held to be a special fund in trust for the State of California.