If I asked you, "Why did you go to that house?" it is natural for you to use the word, "Because" in response.
You are giving the reason why you did something because you have been asked.
This is not sensitive, but simply appropriately responding to a question.
It is, however, a very different situation when the context is an open statement.
In an open statement a truthful person will tell us what happened, what was said, what was seen, and so on. When someone begins to tell us what did not happen, what was not said, what was not seen, and so forth, we now
We must consider why the person has a need to explain or justify an action such as described above.
Think of a case where a garbage collector robs a home.
He is asked, "What happened?" in a way which helps an investigator learn if he was involved in the robbery. Instead of asking the question, "What happened?" directly, the subject is asked to write out, in as much detail as possible, his day.
It should be rather boring, overall, and likely repetitive. Each block, or even each house covered, should be given an equal amount of time (number of words, or lines to describe) in the statement. If the shift was 8 hours, we might see, for example, that on average, he devoted 3 lines of writing (8.5" by 11") per hour. If the shift was 12 hours, it would be less.
We then look for any deviation from the norm.
But let's consider what would happen if he wrote "because" (the reason why) in an open statement.
When training, students become adept, with practice, at noting "so, since, therefore, because..." in flagging it for analysis. They sometimes miss the word "to" when it is used to describe "why." We don't naturally lean to "to", because the word "because" is larger and grabs our attention. The word "to", when used to explain why, in an open statement, means there is a need to justify or explain. Heather puts it this way:
The subject anticipates being asked, "Why did you go there?"
We want to know why this anticipation exists.
"At 1310 Mockingbird Lane there was some objects too big for us to pick up. I left the garbage there but didn't tell the residence that they have to call ahead.
I went to 1313 Mockingbird Lane to collect the trash."
This sentence has two uses of the word "to", with only one of them being sensitive. The sentence "I went to 1313 Mockingbird Lane to collect the trash" also has the word "trash" as different from "garbage", something we would need to explore.
A change of language should represent a change in reality, impacted often by emotions. What caused the change? Was it that "trash" was left behind, while "garbage" was collected? The context would likely answer this for us.
It is, however, the 2nd use of the preposition "to" that is critical.
If he felt the need to tell us why he went to 1313 Mockingbird Lane, did he feel the need to tell us why he went to all the others?
Here, we can see that he is expecting that we are going to ask him an utterly needless question: "Why did you go there?" when it is his job to go there.
That he offered this, in an open statement (not as a result of a question; this is why investigators MUST be silent as possible before getting the written statement), is very sensitive.
This may point to the crime.
Lesson: Do not miss the word "to" when it is used to answer the question "why?" when no question is posed.