What is your view on this?  see below.

Workers’ Compensation fraud is one of the fastest-growing areas of fraud. The National Insurance Crime Bureau reports that Workers’ Compensation fraud accounts for approximately 25 percent of fraud perpetrated and costs $7.2 billion annually. Like in this case, claimants usually take on second jobs while still collecting disability benefits for injuries they claim left them unable to work. In my opinion, surveillance was the proper method to use in this case because it can prove or disprove the legitimacy of an injury and is most commonly used to investigate employee workers' compensation fraud. Usually, surveillance is performed by a private investigator who can take time and date-stamped photographs of a worker. If a worker is injured on the job and claims that he is unable to perform work due to an injury, surveillance can show whether or not he is truly injured through photographic evidence procured during a surveillance operation. 

There are restrictions on how far an employer or insurance company can go when conducting surveillance. The investigator should make sure that he is not violating a person’s reasonable expectation of privacy under the Fourth Amendment to the Constitution, which protects the right of a person against unreasonable searches. Surveillance should be conducted if only other techniques fail. Consultation about privacy is needed beforehand so that the observation conducted is legal and valid.