Did they knock? Did the point a gun at you? How many officers were there? I guess they told you the offense, but do you know the criminal history of this person. Do you know people run out the backdoor all the time, even on minor warrants? Poor training would be standing directly in front of door, where you are expecting them to be. Do you know people lie to officers all the time, especially on warrant attempts? Example: never heard of him. Ain't seen him for weeks...etc. And, why would they stay