"It's frustrating, but like I told some of the victims, we would rather build a strong case and get a conviction, than build a weak case and not get a conviction," said Asbill.

So far this year, FHP has worked a total of 236 fatal crashes in Orange, Osceola, Lake, Seminole, Brevard and Volusia counties as well as the Turnpike. And on top of that they still have a handful of cases open from 2012.

In addition to the uphill battle against resources, FHP said it's often lab results that hold up their investigations.

In hit-and-run crash investigations, DNA evidence is often needed to prove a driver was behind the wheel of a vehicle at the time of a crash.

The results are processed by the Florida Department of Law Enforcement and they could take up to six months to process.

For instance, when a tractor trailer truck ran over and killed a deaf couple who were changing a tire along a stretch of Florida's turnpike in Fort Pierce, the story made headlines all over the state.

FHP later identified a truck driver from Sanford as a person of interest in the case because his vehicle was seen at a nearby toll plaza close in time to the crash.

But until troopers can prove his truck hit them and he was behind the wheel with DNA evidence they cannot make an arrest.

In other cases if the driver of the crash is suspected of being intoxicated, FHP relies on blood tests which according to Asbill can take up to two months to get back.

Then investigators often struggle with interpreting CDR's, or black boxes, that give data readouts about speed and the manner in which the vehicle was being operated.

In the Townsend crash, a witness estimated that Lee appeared to be driving around 50 miles per hour as he drove through the stop sign. His actual speed would have been recorded in his truck's black box but until recently the THI assigned to the case was not trained in reading that data.

FHP said they hope to finish their investigation in that case by the end of the year.