Two words: family money.
There is no statute of limitations on murder in Texas. The lack of evidence would be the reason they haven't brought charges.
Murder has no statute of limitations, therefore charges can still be brought. Under most circumstances, the courts would certify the individual as an adult and the charges would be heard in criminal court, as any other murder.
Attempt Murder?
The FBI had several paid informants which were key in bringing up federal charges against klansmen for violating civil rights of individuals which were murdered. However they were not brought up on murder or conspiracy to commit murder charges.
Kelly was charged with of the murder of Sergeant Kennedy, Constable Scanlan and Lonigan, the various bank robberies, the murder of Sherritt, resisting arrest at Glenrowan and with a long list of minor charges. He was convicted of the willful murder of Constable Lonigan and was sentenced to death
Snoop Dogg has beat murder charges only once and he was acquitted.
Lee Harvey Oswald was accused of John Kennedy's Murder
This question is unclear.
Murder and kidnapping
He was in Dixon Correctional Institute in Louisiana before they brought him up on Charges of murder. While there he was indicted on charges of introducing illegal drugs into a prison. He was transferred to Louisiana State Penitentiary at Angola where he has again been charged with criminal conspiracy to take contraband to and from a penal institution. These two charges could add significantly to his current sentence, the murder charges and likely conviction for those notwithstanding.
A criminal charge is a charge brought forth by law enforcement for a legally punishable crime. An example of criminal charges might be murder, theft, grand theft, and shoplifting.
November 22, 1963 John Kennedy was on his way to a speech.