Lost Pet: Harry

Circumstances

We went out of town and left our neighbor who lives on our property to watch after our pets. Harry is an indoor/outdoor cat and never strays too far from home. He wiggles out of every breakaway collar Ive ever put on him. He always comes home at night, our neighbor said he saw him before we arrived late last night, but this morning he was still not at our door or anywhere around nearby. Its now a full evening later, and he is still nowhere to be found, my 5 kids and I are worried sick.