California Penal Code
591. A person who unlawfully and maliciously takes down, removes,
injures, or obstructs any line of telegraph, telephone, or cable
television, or any other line used to conduct electricity, or any
part thereof, or appurtenances or apparatus connected therewith, or
severs any wire thereof, or makes any unauthorized connection with
any line, other than a telegraph, telephone, or cable television
line, used to conduct electricity, or any part thereof, or
appurtenances or apparatus connected therewith, is punishable by
imprisonment in the state prison, or by a fine not exceeding five
hundred dollars ($500), or imprisonment in the county jail not
exceeding one year.
The trick here is to show that it was done maliciously.
In this case it was done because the check didn't clear the bank. If you contact the police and explain the situation they might take a 591 report, but they may also just refer you to the civil court.
Yes, he certainly can (and did) cut the wires, but there are consequences for those actions civilly, and possibly criminally if you pursue them.