The testimony of the undercover officer, or paid informant, that made the buy - or the eyewitness observation of the officer who witnessed a sale - the narcotics themselves - the marked money used to make the buy - a combination of any or all of these things.
Sufficient probable cause and evidence to place the defendant inside the location which was burglarized.
Anything that can legally be admitted that would convince a juror that someone has committed a crime.
2
The difference is: in civil trials it is a "preponderance of evidence," whereas in a criminal trial it is "beyond a reasonable doubt."
No person shall be convicted of treason unless on the testimony of two credible witnesses.
Sixty Seven senators are needed to convict a government official in an impeachment trial.
"Proof beyond a reasonable doubt."
All twelve.
More information is needed in order to answer. If the property was seized as "contraband" or "evidence" or it had something to do with the transportation of narcotics, you probably cannot regain it, it is forfeited to the government.
12 minimum
The BASIC evidence needed is the testimony of the victim. After that supporting evidence may amount to witnesses statements, DNA evidence, items left at or collected from the scene of the offense, etc, etc.
Under the U.S. Constitution, proof needed to convict a person of treason is very high. There must be either two eye witnesses to the overt act of treason or a confession by the defendant in open court.