I can totally see Tyce as a pyromaniac with anger issues. Hell, Tyce could have a personality disorder, if what Jace says is true (and that's a big if.)
Disregard for others, criminal behavior, fire starting, possible lack of empathy or remorse, below average intelligence...
Edit: DSM-IV criteria for Antisocial Personality Disorder, via Wikipedia
http://en.m.wikipedia.org/wiki/Antisocial_personality_disorder
A) There is a pervasive pattern of disregard for and violation of the rights of others occurring since age 15 years, as indicated by three or more of the following:
- failure to conform to social norms with respect to lawful behaviors as indicated by repeatedly performing acts that are grounds for arrest;
- deception, as indicated by repeatedly lying, use of aliases, or conning others for personal profit or pleasure;
- impulsivity or failure to plan ahead;
- irritability and aggressiveness, as indicated by repeated physical fights or assaults;
- reckless disregard for safety of self or others;
- consistent irresponsibility, as indicated by repeated failure to sustain consistent work behavior or honor financial obligations;
- lack of remorse, as indicated by being indifferent to or rationalizing having hurt, mistreated, or stolen from another;
B) The individual is at least age 18 years.
C) There is evidence of
conduct disorder with onset before age 15 years.
D) The occurrence of
antisocial behavior is not exclusively during the course of
schizophrenia or a
manic episode.