Cop here. If the person who donated it simply said, "watch the stream in 5 minutes." the lawyer they hire would tell the jury this, "that could mean ANYTHING. Doesn't mean my client did the crime."

So, to answer your question... No, not a chance in hell you could get a conviction off that single statement.

HOWEVER you might be able to get a warrant signed by a judge to search that person's computer and look for real evidence that they did it. But honestly, even that is a stretch... I wonder if a judge would sign that warrant. The detectives are going to have to do some leg work on this one.

But here is the REAL reality... If nothing bad comes from this (no one is hurt, cops realize it's a "prank" after the fact)... The cops are going to dust these kids off and send them home. It's simply not worth the work to hunt for the swatter (UNLESS this becomes a real problem or an agency is large enough to dedicate a "task force" to it).

Last week I was assigned a fake call of a security guard fighting with a robbery suspect at a bank. After we arrived and realized it was a prank call, you know what we did? Went to our next call for service.

Unless someone is doing this shit every day, or something bad happens behind the actions of the prank caller, we simply don't have the man power to drop what we're doing and investigate this fully. It's a sad truth, but we're just thankful it's fake, and move on from there.