ambulance chaser

Short definition from Wiktionary

Noun

1. 1
   An unethical attorney who solicits business at the scenes of accidents or in hospitals, in exchange for a percentage of the damages that will be recovered in the case.
2. 2
   An attorney who engages in unethical behavior.
3. 3
   An unethical funeral director or person who engages in the unlicensed sale of services to those who do not yet require them in an attempt to increase business.