There are various reasons you may not have known about the court dates and the subsequent warrants. With regards to the search, I would need more information. Normally, officers do need a search warrant to search your house. However, the officers would have the right to search your immediate vicinity when they arrested you without a search warrant of your house. "Immediate vicinity" can be interpreted in several ways though. If they searched through the whole house in locations you could not possibly get to reasonably quickly at the time of your arrest and some sort of illegal contraband was found, then you might have grounds to suppress that evidence. If nothing illegal found, then there is nothing to suppress. As you can see, there are a lot of legal issues so it is best to contact an attorney in your area. Good luck.