Dallas has three helicopters; 2 Bell 206 JetRangers (N1510L, N1511L) and a Bell 407 (N7160DP). I track them on ADS-B Exchange.
For those that did not already know this, the Bell 407 was donated to the city by Ross Perot, Jr.
I forget exactly where I saw this, but there were comments that the city wanted to purchase a new helicopter. Presumably, I suppose, a replacement for one (or both?) of the aged 206 Jet Rangers. No idea if that made it into the new budget (effective this past October 1st), or it's still on a 'wish list' for a future, unspecified, date.
When DPD's copter is up, they usually fly more or less over my house going to & from their base. I'm to the northeast of their base at Dallas Executive Airport, the replacement name for the Red Bird airport. I follow them, as well as the CareFlite birds, on Flightradar24.