Final answer:
There's no specific mention in the provided material of the three types of crimes that have increased between 2008 and 2009; however, overall crime rates, especially violent and gun-related offenses, have declined since the 1990s.
Step-by-step explanation:
Even though the number of juvenile court cases involving violent offense decreased by 8% between 2008 and 2009, according to the data provided, there is no specific mention of three types of crimes that have increased during this period in the material provided. Crime rates, particularly for violent and gun-related crimes, have been on an overall decline since peaking in the early 1990s. This aligns with the broader trend of falling crime rates over the past decades despite public perception often believing otherwise. While certain types of nonviolent crimes may be increasing, the information required to accurately identify which specific crimes these are is not present in the reference material.