Cocaine is commonly available as a white powder. Crack is 'freebased' cocaine made into small crystals which is then smoked. . .

Roseanne Holland

These photographs, from Florida police files chart the physical decline
of Roseanne Holland, a crack and heroin user, over a 20 year period.
At the time of the last photograph, Roseanne Holland was just 38 years old.
This is what crack will do to you.

Melissa Collara

Melissa's story is particularly sad owing to her young age. She was 18 when the first photo was taken and only 21 by the time the second photo was taken. During this period of time she was arrested 17 times for prostitution to pay for her crack addiction. (source - Metropolitan Police)