I haven't seen any mention of his bio parents. Supposedly NC's Mom said the bio Mom was a drug addict. Posters
here speculated she may have been prostituting to get drugs in which case maybe she didn't know who dad was.
NC was shown in court signing some papers. Other than that I haven't seen any handwriting.
EXCLUSIVE - 'This is the signature of a nonconformist': Parkland school shooter Nikolas Cruz's chaotic, childlike handwriting reveals an identity crisis and his impulsive, defiant nature, say experts
http://www.dailymail.co.uk/news/article-5441889/Nikolas-Cruzs-childlike-handwriting-reveals.html
Nikolas Cruz's childlike signature can be revealed in court documents and his scrawl-like writing reveals his chaotic, impulsive personality, DailyMail.com can reveal.
The signature was contained in a court document filed last week but was signed by Cruz on February 15, a day after he killed 17 people at Stoneman Douglas High School in Parkland.
According to two handwriting experts, it is indicative of a nonconformist who does not know who he is and has a desire to stand apart from the crowd.
This is from his signature. It would be nice to see more of his handwriting.
Characteristics Of Nikolas Cruz's Handwriting
-Chaotic And Disjointed
-Stingers In K's, I's, And O's
-O's Look Like Numbers
-Z's Not Consistent
-Mix Of Capitals And Lower Case
-Left Angles
Stephen Paddock's Handwriting
Characteristics Of Stephen Paddock's Handwriting
-Straight And Right Angles
-Consistent Pressure And Bold
-Use Of Print And Cursive
-Signature Looks Like Scribble
Lori Drew's Handwriting
Characteristics Of Lori Drew's Handwriting
-Inconsistent Pressure
-Considerable Muddying
-Mostly Right Angles
-Some F's And G's Look Like Numbers
-Numbers Look Like Letters
-Use Of Print And Cursive
-Inconsistent Spacing
-Wording Is Spaced, While Within Words Less Space
-Slants All Over The Place, Straight, Upward, And Downward
-Stingers In C's
-Lower Part Of A's Are Angled
-Cursive L's Look Like Cross Between Print And Cursive
Jerry Sandusky's Handwriting
Characteristics Of Jerry Sandusky's Handwriting
-Consistent Pressure
-Considerable Muddying, It Is Ubiquitous
-Mostly Right Angles
-Use Only Cursive
-Consistent Spacing
-Slants Are Mostly Straight With Some Downward Slant
-Stingers In C's
-The Dot Above "I" Is To T
Osama bin Laden's Handwriting
It is is Arabic.
Characteristics Of Osama bin Laden's Handwriting
-Consistent Pressure
-Considerable Muddying
-Heavy Pressure
Osoma bin Laden's Handwriting
http://www.annakoren.com/report-sep-eng.html
5 Hell Traits Revealed in Handwriting
https://handwritinguniversity.com/members/weekly-newsletters/5hell-traits/
Looking at all their handwritings, this suggests they are more similar to each other.