More details are emerging about the hours and days following the tragic shooting death of Miami Gardens teenager Trayvon Martin in Sanford, Florida, Feb. 26.

According to Good Morning America, the lead investigator in the case didn’t believe George Zimmerman’s claims of self defense.

The lead homicide investigator in the shooting of unarmed teenager Trayvon Martin recommended that neighborhood watch captain George Zimmerman be charged with manslaughter the night of the shooting.

But Sanford, Fla., Investigator Chris Serino was instructed to not press charges against Zimmerman because the state attorney’s office headed by Norman Wolfinger determined there wasn’t enough evidence to lead to a conviction, the sources told ABC News.

Police brought Zimmerman into the station for questioning for a few hours on the night of the shooting, said Zimmerman’s attorney, despite his request for medical attention first. Ultimately they had to accept Zimmerman’s claim of self defense. He was never charged with a crime.

Serino filed an affidavit on Feb. 26, the night that Martin was shot and killed by Zimmerman, that stated he was unconvinced Zimmerman’s version of events.

Zimmerman, 28, claimed he shot Martin, 17, in self defense.

There is also word that Zimmerman’s father is a retired magistrate judge who may have used his influence to get criminal cases against his son dropped.