I was arrested for possession of cocaine when the police officer stopped my car for speeding and then searched my car and found the cocaine in the trunk? Was it legal for him to search my trunk?

The police officer has to have probable cause to search your vehicle. IF he only stopped you for speeding and there was no other “smell” of illegal drug use and no other evidence to support “probable cause” then the police officer likely violated your constitutional rights when he searched your trunk. This assumes you did not give him consent to search your trunk. You should immediately retain an experienced criminal defense drug attorney who will protect your rights. Our law firm can file a motion to suppress evidence pursuant to Penal Code Section 1538.5 and attempt to convince the judge that the evidence against you should be suppressed. If the motion is granted then the charges against you would likely be dismissed.