the entered without force/didn't break in/it was open when I got here ruse is commonly used by travellers who invade the field behind my house most years.
At 8pm the gate is closed and padlocked. At 8:01 person A breaks off the padlock and pushes the gate open. At 8:02 person B, with a truck, a caravan, a family of 12 and thirty close friends who also have trucks caravans and familes, while driving by, happen to stop next to the gate and observe that it is unlocked. They then drive onto the field and by 8:05 are in occupation of it, and declare that they entered without force through an open gate.
Nobody seems to know anything about person A.