TMZ is reporting that Heather Locklear (who is currently going thru a custody battle for the child she has with Richie Sambora — who has also been busted for DUI) was arrested in the Santa Barbara, CA area last night under the suspicion that she was driving while under the influence … of something:

TMZ has learned Heather Locklear was arrested yesterday on suspicion of driving while impaired. Locklear was pulled over while driving in the Santa Barbara area. Law enforcement officers tell us alcohol was not involved, however they are conducting tests to determine if Locklear was under the influence of drugs. We’re told she was released on her own recognizance, without having to post bail. This could set up a bizarre custody battle given that Locklear and ex hubby Richie Sambora have both been busted for similar charges.

You may recall that Heather voluntarily checked herself into a medical facility in Arizona to treat depression last June … but could she be dealing with substance abuse issues as well? I’m actually pretty floored that the police just let her go on her own recognizance just because she’s a celebrity. It’s really just … mind-boggling that these sorts of things happen in our justice system and no one really bats an eyelash. In any event, I’m sure we’ll know soon enough if she was under the influence of something and whether or not she’ll be punished for this alleged crime. My guess … nothing will ever come of this at all.

[Source]